//! Data Transfer Objects crossing the IPC boundary.
//!
//! Convention (frozen here for L1, see L1-ipc-bridge.md "points d'attention"):
//! **all IPC payloads are `camelCase`** via `#[serde(rename_all = "camelCase")]`.
//! Rust uses `snake_case` fields; serde renames them on the wire so the
//! TypeScript side sees idiomatic camelCase. This matches the persisted-domain
//! JSON convention already used in the domain (`agents.json` etc.).

use serde::{Deserialize, Serialize};

use application::{
    AppError, CreateProjectInput, CreateProjectOutput, GitGraphOutput, HealthInput, HealthReport,
    LayoutKind, ListProjectsOutput, OpenProjectOutput,
};
use domain::{Project, ProjectId};

/// Request DTO for the `health` command.
#[derive(Debug, Clone, Default, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct HealthRequestDto {
    /// Optional note echoed back by the use case.
    #[serde(default)]
    pub note: Option<String>,
}

impl From<HealthRequestDto> for HealthInput {
    fn from(dto: HealthRequestDto) -> Self {
        Self { note: dto.note }
    }
}

/// Response DTO for the `health` command.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct HealthResponseDto {
    /// Application version.
    pub version: String,
    /// Liveness flag.
    pub alive: bool,
    /// Server time in epoch milliseconds.
    pub time_millis: i64,
    /// Correlation id for this call.
    pub correlation_id: String,
    /// Echoed note, if any.
    pub note: Option<String>,
}

impl From<HealthReport> for HealthResponseDto {
    fn from(r: HealthReport) -> Self {
        Self {
            version: r.version,
            alive: r.alive,
            time_millis: r.time_millis,
            correlation_id: r.correlation_id,
            note: r.note,
        }
    }
}

/// Error DTO returned to the frontend in the `Err` arm of every command.
///
/// `code` is a stable machine-readable string (see [`AppError::code`]); the
/// frontend branches on it without parsing `message`.
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ErrorDto {
    /// Stable error code, e.g. `NOT_FOUND`, `INVALID`.
    pub code: String,
    /// Human-readable message.
    pub message: String,
}

impl From<AppError> for ErrorDto {
    fn from(e: AppError) -> Self {
        Self {
            code: e.code().to_owned(),
            message: e.to_string(),
        }
    }
}

// ---------------------------------------------------------------------------
// Projects (L2)
// ---------------------------------------------------------------------------

/// A project as seen by the frontend (camelCase wire shape).
///
/// `remote` is the domain [`domain::RemoteRef`], which already serialises
/// camelCase + tagged (`kind`), so we embed it directly.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct ProjectDto {
    /// Stable project id (UUID string).
    pub id: String,
    /// Display name.
    pub name: String,
    /// Absolute project root.
    pub root: String,
    /// Where the project lives (`{ "kind": "local" }`, `ssh`, `wsl`).
    pub remote: domain::RemoteRef,
    /// Creation timestamp, epoch milliseconds.
    pub created_at: i64,
}

impl From<Project> for ProjectDto {
    fn from(p: Project) -> Self {
        Self {
            id: p.id.to_string(),
            name: p.name,
            root: p.root.as_str().to_owned(),
            remote: p.remote,
            created_at: p.created_at,
        }
    }
}

/// Request DTO for `create_project`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct CreateProjectRequestDto {
    /// Display name.
    pub name: String,
    /// Absolute project root.
    pub root: String,
    /// Optional remote reference; defaults to local when omitted.
    #[serde(default)]
    pub remote: Option<domain::RemoteRef>,
    /// Optional default profile id.
    #[serde(default)]
    pub default_profile_id: Option<String>,
}

impl From<CreateProjectRequestDto> for CreateProjectInput {
    fn from(dto: CreateProjectRequestDto) -> Self {
        Self {
            name: dto.name,
            root: dto.root,
            remote: dto.remote,
            default_profile_id: dto.default_profile_id,
        }
    }
}

impl From<CreateProjectOutput> for ProjectDto {
    fn from(out: CreateProjectOutput) -> Self {
        out.project.into()
    }
}

impl From<OpenProjectOutput> for ProjectDto {
    fn from(out: OpenProjectOutput) -> Self {
        out.project.into()
    }
}

/// Parses a project-id string (UUID) coming from the frontend.
///
/// # Errors
/// Returns an [`ErrorDto`] with code `INVALID` if the string is not a UUID.
pub fn parse_project_id(raw: &str) -> Result<ProjectId, ErrorDto> {
    uuid::Uuid::parse_str(raw)
        .map(ProjectId::from_uuid)
        .map_err(|_| ErrorDto {
            code: "INVALID".to_owned(),
            message: format!("invalid project id: {raw}"),
        })
}

/// Response DTO for `list_projects`.
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct ProjectListDto(pub Vec<ProjectDto>);

impl From<ListProjectsOutput> for ProjectListDto {
    fn from(out: ListProjectsOutput) -> Self {
        Self(out.projects.into_iter().map(ProjectDto::from).collect())
    }
}

// ---------------------------------------------------------------------------
// Terminals (L3)
// ---------------------------------------------------------------------------

use application::{
    CloseTerminalInput, CloseTerminalOutput, OpenTerminalInput, OpenTerminalOutput,
    ResizeTerminalInput, WriteToTerminalInput,
};
use domain::SessionId;

/// Request DTO for `open_terminal`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct OpenTerminalRequestDto {
    /// Working directory (typically the project root).
    pub cwd: String,
    /// Initial terminal height in rows.
    pub rows: u16,
    /// Initial terminal width in columns.
    pub cols: u16,
    /// Optional explicit command; defaults to the platform shell when omitted.
    #[serde(default)]
    pub command: Option<String>,
    /// Optional arguments for the command.
    #[serde(default)]
    pub args: Vec<String>,
}

impl From<OpenTerminalRequestDto> for OpenTerminalInput {
    fn from(dto: OpenTerminalRequestDto) -> Self {
        Self {
            cwd: dto.cwd,
            rows: dto.rows,
            cols: dto.cols,
            command: dto.command,
            args: dto.args,
            node_id: None,
        }
    }
}

/// Response DTO for `open_terminal`: the freshly-opened session.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct TerminalSessionDto {
    /// Stable session id (UUID string) — used for write/resize/close + the
    /// output channel.
    pub session_id: String,
    /// Working directory the shell runs in.
    pub cwd: String,
    /// Current rows.
    pub rows: u16,
    /// Current cols.
    pub cols: u16,
}

impl From<OpenTerminalOutput> for TerminalSessionDto {
    fn from(out: OpenTerminalOutput) -> Self {
        let s = out.session;
        Self {
            session_id: s.id.to_string(),
            cwd: s.cwd.as_str().to_owned(),
            rows: s.pty_size.rows,
            cols: s.pty_size.cols,
        }
    }
}

/// Request DTO for `write_terminal`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct WriteTerminalRequestDto {
    /// Target session id.
    pub session_id: String,
    /// Bytes to write (xterm keystrokes).
    pub data: Vec<u8>,
}

impl WriteTerminalRequestDto {
    /// Converts to the use-case input, parsing the session id.
    ///
    /// # Errors
    /// [`ErrorDto`] with code `INVALID` if the id is malformed.
    pub fn into_input(self) -> Result<WriteToTerminalInput, ErrorDto> {
        Ok(WriteToTerminalInput {
            session_id: parse_session_id(&self.session_id)?,
            data: self.data,
        })
    }
}

/// Request DTO for `resize_terminal`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ResizeTerminalRequestDto {
    /// Target session id.
    pub session_id: String,
    /// New rows.
    pub rows: u16,
    /// New cols.
    pub cols: u16,
}

impl ResizeTerminalRequestDto {
    /// Converts to the use-case input, parsing the session id.
    ///
    /// # Errors
    /// [`ErrorDto`] with code `INVALID` if the id is malformed.
    pub fn into_input(self) -> Result<ResizeTerminalInput, ErrorDto> {
        Ok(ResizeTerminalInput {
            session_id: parse_session_id(&self.session_id)?,
            rows: self.rows,
            cols: self.cols,
        })
    }
}

/// Response DTO for `close_terminal`.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct TerminalClosedDto {
    /// Exit code, if the process reported one.
    pub code: Option<i32>,
}

impl From<CloseTerminalOutput> for TerminalClosedDto {
    fn from(out: CloseTerminalOutput) -> Self {
        Self { code: out.code }
    }
}

/// Builds a [`CloseTerminalInput`] from a raw session-id string.
///
/// # Errors
/// [`ErrorDto`] with code `INVALID` if the id is malformed.
pub fn parse_close_terminal(raw: &str) -> Result<CloseTerminalInput, ErrorDto> {
    Ok(CloseTerminalInput {
        session_id: parse_session_id(raw)?,
    })
}

/// Parses a session-id string (UUID) coming from the frontend.
///
/// # Errors
/// Returns an [`ErrorDto`] with code `INVALID` if the string is not a UUID.
pub fn parse_session_id(raw: &str) -> Result<SessionId, ErrorDto> {
    uuid::Uuid::parse_str(raw)
        .map(SessionId::from_uuid)
        .map_err(|_| ErrorDto {
            code: "INVALID".to_owned(),
            message: format!("invalid session id: {raw}"),
        })
}

// ---------------------------------------------------------------------------
// Layout (L4 + #4 management + #3 per-cell agent)
// ---------------------------------------------------------------------------

use application::{
    CreateLayoutOutput, DeleteLayoutOutput, LayoutInfo, LayoutOperation, ListLayoutsOutput,
    LoadLayoutOutput, MutateLayoutOutput,
};
use domain::{AgentId, Direction, LayoutId, LayoutTree, NodeId};

/// Response DTO carrying a layout tree.
///
/// [`LayoutTree`] already serialises camelCase + tagged (its enum uses
/// `#[serde(tag = "type", content = "node")]`), so we embed it directly; the
/// TypeScript mirror in `@/domain` matches this shape.
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct LayoutDto(pub LayoutTree);

impl From<LoadLayoutOutput> for LayoutDto {
    fn from(out: LoadLayoutOutput) -> Self {
        Self(out.layout)
    }
}

impl From<MutateLayoutOutput> for LayoutDto {
    fn from(out: MutateLayoutOutput) -> Self {
        Self(out.layout)
    }
}

/// A layout operation as sent by the frontend (tagged on `type`, camelCase).
///
/// Mirrors [`LayoutOperation`]; node/session ids cross the wire as UUID strings
/// and are parsed here. `direction` reuses the domain [`Direction`] (which
/// already serialises `"row"`/`"column"`).
#[derive(Debug, Clone, Deserialize)]
#[serde(tag = "type", rename_all = "camelCase")]
pub enum LayoutOperationDto {
    /// Split a leaf into a two-child split.
    #[serde(rename_all = "camelCase")]
    Split {
        /// Leaf to split.
        target: String,
        /// Row (columns) or Column (rows).
        direction: Direction,
        /// Id for the new sibling leaf.
        new_leaf: String,
        /// Id for the wrapping split container.
        container: String,
    },
    /// Collapse a split container back to one child.
    #[serde(rename_all = "camelCase")]
    Merge {
        /// Split container to collapse.
        container: String,
        /// Index of the child to keep.
        keep_index: usize,
    },
    /// Reassign a split's child weights.
    #[serde(rename_all = "camelCase")]
    Resize {
        /// Split container to resize.
        container: String,
        /// New weights (one per child).
        weights: Vec<f32>,
    },
    /// Move a session from one leaf to another.
    #[serde(rename_all = "camelCase")]
    Move {
        /// Source leaf.
        from: String,
        /// Target (empty) leaf.
        to: String,
    },
    /// Attach/detach a session to/from a leaf.
    #[serde(rename_all = "camelCase")]
    SetSession {
        /// Hosting leaf.
        target: String,
        /// Session id, or `null` to clear.
        #[serde(default)]
        session: Option<String>,
    },
    /// Attach/detach an agent to/from a leaf (#3 per-cell agent).
    #[serde(rename_all = "camelCase")]
    SetCellAgent {
        /// Hosting leaf.
        target: String,
        /// Agent id, or `null` to clear.
        #[serde(default)]
        agent: Option<String>,
    },
}

impl LayoutOperationDto {
    /// Converts to the use-case operation, parsing all ids.
    ///
    /// # Errors
    /// [`ErrorDto`] with code `INVALID` if any id is malformed.
    pub fn into_operation(self) -> Result<LayoutOperation, ErrorDto> {
        Ok(match self {
            Self::Split {
                target,
                direction,
                new_leaf,
                container,
            } => LayoutOperation::Split {
                target: parse_node_id(&target)?,
                direction,
                new_leaf: parse_node_id(&new_leaf)?,
                container: parse_node_id(&container)?,
            },
            Self::Merge {
                container,
                keep_index,
            } => LayoutOperation::Merge {
                container: parse_node_id(&container)?,
                keep_index,
            },
            Self::Resize { container, weights } => LayoutOperation::Resize {
                container: parse_node_id(&container)?,
                weights,
            },
            Self::Move { from, to } => LayoutOperation::Move {
                from: parse_node_id(&from)?,
                to: parse_node_id(&to)?,
            },
            Self::SetSession { target, session } => LayoutOperation::SetSession {
                target: parse_node_id(&target)?,
                session: session.as_deref().map(parse_session_id).transpose()?,
            },
            Self::SetCellAgent { target, agent } => LayoutOperation::SetCellAgent {
                target: parse_node_id(&target)?,
                agent: agent.as_deref().map(parse_agent_id).transpose()?,
            },
        })
    }
}

/// Parses a node-id string (UUID) coming from the frontend.
///
/// # Errors
/// Returns an [`ErrorDto`] with code `INVALID` if the string is not a UUID.
pub fn parse_node_id(raw: &str) -> Result<NodeId, ErrorDto> {
    uuid::Uuid::parse_str(raw)
        .map(NodeId::from_uuid)
        .map_err(|_| ErrorDto {
            code: "INVALID".to_owned(),
            message: format!("invalid node id: {raw}"),
        })
}

/// Parses a layout-id string (UUID) coming from the frontend.
///
/// # Errors
/// Returns an [`ErrorDto`] with code `INVALID` if the string is not a UUID.
pub fn parse_layout_id(raw: &str) -> Result<LayoutId, ErrorDto> {
    uuid::Uuid::parse_str(raw)
        .map(LayoutId::from_uuid)
        .map_err(|_| ErrorDto {
            code: "INVALID".to_owned(),
            message: format!("invalid layout id: {raw}"),
        })
}

// ---------------------------------------------------------------------------
// Layouts (#4) — management DTOs
// ---------------------------------------------------------------------------

/// Lightweight layout descriptor (id + name + kind), for the tab bar.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct LayoutInfoDto {
    /// Stable layout id (UUID string).
    pub id: String,
    /// Display name.
    pub name: String,
    /// Layout kind: `"terminal"` or `"gitGraph"`.
    pub kind: String,
}

impl From<LayoutInfo> for LayoutInfoDto {
    fn from(info: LayoutInfo) -> Self {
        let kind = match info.kind {
            LayoutKind::Terminal => "terminal",
            LayoutKind::GitGraph => "gitGraph",
        }
        .to_owned();
        Self {
            id: info.id.to_string(),
            name: info.name,
            kind,
        }
    }
}

/// Response DTO for `list_layouts`.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct ListLayoutsDto {
    /// All named layouts (id + name), in order.
    pub layouts: Vec<LayoutInfoDto>,
    /// The id of the currently active layout.
    pub active_id: String,
}

impl From<ListLayoutsOutput> for ListLayoutsDto {
    fn from(out: ListLayoutsOutput) -> Self {
        Self {
            layouts: out.layouts.into_iter().map(LayoutInfoDto::from).collect(),
            active_id: out.active_id.to_string(),
        }
    }
}

/// Response DTO for `create_layout`.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct CreateLayoutResultDto {
    /// The id minted for the new layout.
    pub layout_id: String,
}

impl From<CreateLayoutOutput> for CreateLayoutResultDto {
    fn from(out: CreateLayoutOutput) -> Self {
        Self {
            layout_id: out.layout_id.to_string(),
        }
    }
}

/// Response DTO for `delete_layout`.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct DeleteLayoutResultDto {
    /// The active layout after the deletion.
    pub active_id: String,
}

impl From<DeleteLayoutOutput> for DeleteLayoutResultDto {
    fn from(out: DeleteLayoutOutput) -> Self {
        Self {
            active_id: out.active_id.to_string(),
        }
    }
}

/// Request DTO for `create_layout`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct CreateLayoutRequestDto {
    /// Owning project id.
    pub project_id: String,
    /// Display name for the new layout.
    pub name: String,
    /// Optional layout kind: `"terminal"` (default) or `"gitGraph"`.
    #[serde(default)]
    pub kind: Option<String>,
}

impl CreateLayoutRequestDto {
    /// Parses the optional `kind` string into a [`LayoutKind`].
    ///
    /// # Errors
    /// [`ErrorDto`] with code `INVALID` if the value is not a known kind.
    pub fn parse_kind(&self) -> Result<LayoutKind, ErrorDto> {
        match self.kind.as_deref() {
            None | Some("terminal") => Ok(LayoutKind::Terminal),
            Some("gitGraph") => Ok(LayoutKind::GitGraph),
            Some(other) => Err(ErrorDto {
                code: "INVALID".to_owned(),
                message: format!("unknown layout kind: {other}"),
            }),
        }
    }
}

/// Request DTO for `rename_layout`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct RenameLayoutRequestDto {
    /// Owning project id.
    pub project_id: String,
    /// Layout to rename.
    pub layout_id: String,
    /// New display name.
    pub name: String,
}

/// Request DTO for `delete_layout`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct DeleteLayoutRequestDto {
    /// Owning project id.
    pub project_id: String,
    /// Layout to delete.
    pub layout_id: String,
}

/// Request DTO for `set_active_layout`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SetActiveLayoutRequestDto {
    /// Owning project id.
    pub project_id: String,
    /// Layout to make active.
    pub layout_id: String,
}

// ---------------------------------------------------------------------------
// Profiles & first-run (L5)
// ---------------------------------------------------------------------------

use application::{
    ConfigureProfilesInput, ConfigureProfilesOutput, DeleteProfileInput, DetectProfilesInput,
    DetectProfilesOutput, FirstRunStateOutput, ListProfilesOutput, ProfileAvailability,
    ReferenceProfilesOutput, SaveProfileInput, SaveProfileOutput,
};
use domain::profile::AgentProfile;
use domain::ProfileId;

/// A profile crossing the wire. [`AgentProfile`] already serialises camelCase
/// (id, name, command, args, `contextInjection{strategy,…}`, detect,
/// `cwdTemplate`), so we embed it directly — the TS mirror matches this shape.
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(transparent)]
pub struct ProfileDto(pub AgentProfile);

/// A list of profiles (camelCase array on the wire).
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct ProfileListDto(pub Vec<ProfileDto>);

impl From<Vec<AgentProfile>> for ProfileListDto {
    fn from(v: Vec<AgentProfile>) -> Self {
        Self(v.into_iter().map(ProfileDto).collect())
    }
}

impl From<ListProfilesOutput> for ProfileListDto {
    fn from(out: ListProfilesOutput) -> Self {
        out.profiles.into()
    }
}

impl From<ReferenceProfilesOutput> for ProfileListDto {
    fn from(out: ReferenceProfilesOutput) -> Self {
        out.profiles.into()
    }
}

impl From<SaveProfileOutput> for ProfileDto {
    fn from(out: SaveProfileOutput) -> Self {
        Self(out.profile)
    }
}

/// Request DTO for `detect_profiles`: the candidate profiles to probe.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct DetectProfilesRequestDto {
    /// Candidate profiles whose `detect` command should be run.
    pub candidates: Vec<AgentProfile>,
}

impl From<DetectProfilesRequestDto> for DetectProfilesInput {
    fn from(dto: DetectProfilesRequestDto) -> Self {
        Self {
            candidates: dto.candidates,
        }
    }
}

/// One availability result (`profile` + whether its CLI is installed).
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct ProfileAvailabilityDto {
    /// The probed profile.
    pub profile: AgentProfile,
    /// Whether the CLI was detected (exit code 0).
    pub available: bool,
}

impl From<ProfileAvailability> for ProfileAvailabilityDto {
    fn from(a: ProfileAvailability) -> Self {
        Self {
            profile: a.profile,
            available: a.available,
        }
    }
}

/// Response DTO for `detect_profiles`.
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct DetectProfilesResponseDto(pub Vec<ProfileAvailabilityDto>);

impl From<DetectProfilesOutput> for DetectProfilesResponseDto {
    fn from(out: DetectProfilesOutput) -> Self {
        Self(out.results.into_iter().map(Into::into).collect())
    }
}

/// Request DTO for `save_profile`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SaveProfileRequestDto {
    /// The profile to upsert.
    pub profile: AgentProfile,
}

impl From<SaveProfileRequestDto> for SaveProfileInput {
    fn from(dto: SaveProfileRequestDto) -> Self {
        Self {
            profile: dto.profile,
        }
    }
}

/// Request DTO for `configure_profiles` (closes the first run).
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ConfigureProfilesRequestDto {
    /// All profiles the user chose to keep.
    pub profiles: Vec<AgentProfile>,
}

impl From<ConfigureProfilesRequestDto> for ConfigureProfilesInput {
    fn from(dto: ConfigureProfilesRequestDto) -> Self {
        Self {
            profiles: dto.profiles,
        }
    }
}

impl From<ConfigureProfilesOutput> for ProfileListDto {
    fn from(out: ConfigureProfilesOutput) -> Self {
        out.profiles.into()
    }
}

/// Response DTO for `first_run_state`.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct FirstRunStateDto {
    /// `true` when the first-run wizard should be shown.
    pub is_first_run: bool,
    /// Pre-filled reference catalogue to seed the wizard.
    pub reference_profiles: Vec<AgentProfile>,
}

impl From<FirstRunStateOutput> for FirstRunStateDto {
    fn from(out: FirstRunStateOutput) -> Self {
        Self {
            is_first_run: out.is_first_run,
            reference_profiles: out.reference_profiles,
        }
    }
}

/// Builds a [`DeleteProfileInput`] from a raw profile-id string.
///
/// # Errors
/// [`ErrorDto`] with code `INVALID` if the id is malformed.
pub fn parse_delete_profile(raw: &str) -> Result<DeleteProfileInput, ErrorDto> {
    Ok(DeleteProfileInput {
        id: parse_profile_id(raw)?,
    })
}

/// Parses a profile-id string (UUID) coming from the frontend.
///
/// # Errors
/// Returns an [`ErrorDto`] with code `INVALID` if the string is not a UUID.
pub fn parse_profile_id(raw: &str) -> Result<ProfileId, ErrorDto> {
    uuid::Uuid::parse_str(raw)
        .map(ProfileId::from_uuid)
        .map_err(|_| ErrorDto {
            code: "INVALID".to_owned(),
            message: format!("invalid profile id: {raw}"),
        })
}

// ---------------------------------------------------------------------------
// Agents (L6)
// ---------------------------------------------------------------------------

use application::{
    CreateAgentOutput, LaunchAgentOutput, ListAgentsOutput, ReadAgentContextOutput,
};
use domain::Agent;

/// An agent crossing the wire. [`Agent`] already serialises camelCase
/// (`id`, `name`, `contextPath`, `profileId`, `origin` tagged, `synchronized`),
/// so we embed it directly — the TS mirror matches this shape.
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct AgentDto(pub Agent);

/// A list of agents (camelCase array on the wire).
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct AgentListDto(pub Vec<AgentDto>);

impl From<ListAgentsOutput> for AgentListDto {
    fn from(out: ListAgentsOutput) -> Self {
        Self(out.agents.into_iter().map(AgentDto).collect())
    }
}

impl From<CreateAgentOutput> for AgentDto {
    fn from(out: CreateAgentOutput) -> Self {
        Self(out.agent)
    }
}

/// Request DTO for `create_agent`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct CreateAgentRequestDto {
    /// Id of the owning project.
    pub project_id: String,
    /// Display name for the new agent.
    pub name: String,
    /// Runtime profile id.
    pub profile_id: String,
    /// Initial Markdown content (empty when absent).
    #[serde(default)]
    pub initial_content: Option<String>,
}

/// Response DTO for `read_agent_context`.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct ReadAgentContextResponseDto {
    /// The agent's Markdown context content.
    pub content: String,
}

impl From<ReadAgentContextOutput> for ReadAgentContextResponseDto {
    fn from(out: ReadAgentContextOutput) -> Self {
        Self {
            content: out.content.into_string(),
        }
    }
}

/// Request DTO for `update_agent_context`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct UpdateAgentContextRequestDto {
    /// Id of the owning project.
    pub project_id: String,
    /// Id of the agent to update.
    pub agent_id: String,
    /// New Markdown content.
    pub content: String,
}

/// Request DTO for `launch_agent`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct LaunchAgentRequestDto {
    /// Id of the owning project.
    pub project_id: String,
    /// Id of the agent to launch.
    pub agent_id: String,
    /// Initial terminal height in rows.
    pub rows: u16,
    /// Initial terminal width in columns.
    pub cols: u16,
}

impl From<LaunchAgentOutput> for TerminalSessionDto {
    fn from(out: LaunchAgentOutput) -> Self {
        let s = out.session;
        Self {
            session_id: s.id.to_string(),
            cwd: s.cwd.as_str().to_owned(),
            rows: s.pty_size.rows,
            cols: s.pty_size.cols,
        }
    }
}

/// Parses an agent-id string (UUID) coming from the frontend.
///
/// # Errors
/// Returns an [`ErrorDto`] with code `INVALID` if the string is not a UUID.
pub fn parse_agent_id(raw: &str) -> Result<AgentId, ErrorDto> {
    uuid::Uuid::parse_str(raw)
        .map(AgentId::from_uuid)
        .map_err(|_| ErrorDto {
            code: "INVALID".to_owned(),
            message: format!("invalid agent id: {raw}"),
        })
}

// ---------------------------------------------------------------------------
// Templates & sync (L7)
// ---------------------------------------------------------------------------

use application::{
    AgentDrift, CreateAgentFromTemplateInput, CreateTemplateInput,
    CreateTemplateOutput, DetectAgentDriftOutput, ListTemplatesOutput, SyncAgentWithTemplateOutput,
    UpdateTemplateInput, UpdateTemplateOutput,
};
use domain::{AgentTemplate, TemplateId};

/// A template crossing the wire. [`AgentTemplate`] already serialises camelCase
/// (`id`, `name`, `contentMd`, `version` as a number, `defaultProfileId`),
/// so we embed it directly — the TS mirror matches this shape.
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct TemplateDto(pub AgentTemplate);

/// A list of templates (transparent array on the wire).
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct TemplateListDto(pub Vec<TemplateDto>);

impl From<ListTemplatesOutput> for TemplateListDto {
    fn from(out: ListTemplatesOutput) -> Self {
        Self(out.templates.into_iter().map(TemplateDto).collect())
    }
}

impl From<CreateTemplateOutput> for TemplateDto {
    fn from(out: CreateTemplateOutput) -> Self {
        Self(out.template)
    }
}

impl From<UpdateTemplateOutput> for TemplateDto {
    fn from(out: UpdateTemplateOutput) -> Self {
        Self(out.template)
    }
}

/// Request DTO for `create_template`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct CreateTemplateRequestDto {
    /// Display name.
    pub name: String,
    /// Initial Markdown content.
    pub content: String,
    /// Default runtime profile id for agents created from this template.
    pub default_profile_id: String,
}

impl CreateTemplateRequestDto {
    /// Converts to the use-case input, parsing the profile id.
    ///
    /// # Errors
    /// [`ErrorDto`] with code `INVALID` if the profile id is malformed.
    pub fn into_input(self) -> Result<CreateTemplateInput, ErrorDto> {
        Ok(CreateTemplateInput {
            name: self.name,
            content: self.content,
            default_profile_id: parse_profile_id(&self.default_profile_id)?,
        })
    }
}

/// Request DTO for `update_template`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct UpdateTemplateRequestDto {
    /// Id of the template to update.
    pub template_id: String,
    /// New Markdown content.
    pub content: String,
}

impl UpdateTemplateRequestDto {
    /// Converts to the use-case input, parsing the template id.
    ///
    /// # Errors
    /// [`ErrorDto`] with code `INVALID` if the template id is malformed.
    pub fn into_input(self) -> Result<UpdateTemplateInput, ErrorDto> {
        Ok(UpdateTemplateInput {
            template_id: parse_template_id(&self.template_id)?,
            content: self.content,
        })
    }
}

/// Parses a template-id string (UUID) coming from the frontend.
///
/// # Errors
/// Returns an [`ErrorDto`] with code `INVALID` if the string is not a UUID.
pub fn parse_template_id(raw: &str) -> Result<TemplateId, ErrorDto> {
    uuid::Uuid::parse_str(raw)
        .map(TemplateId::from_uuid)
        .map_err(|_| ErrorDto {
            code: "INVALID".to_owned(),
            message: format!("invalid template id: {raw}"),
        })
}

/// Request DTO for `create_agent_from_template`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct CreateAgentFromTemplateRequestDto {
    /// Id of the owning project.
    pub project_id: String,
    /// Source template id.
    pub template_id: String,
    /// Optional agent name; defaults to the template's name when absent.
    #[serde(default)]
    pub name: Option<String>,
    /// Whether the agent tracks the template for future syncs.
    pub synchronized: bool,
}

impl CreateAgentFromTemplateRequestDto {
    /// Converts to the use-case input, given the resolved project.
    ///
    /// # Errors
    /// [`ErrorDto`] with code `INVALID` if the template id is malformed.
    pub fn into_input(
        self,
        project: domain::Project,
    ) -> Result<CreateAgentFromTemplateInput, ErrorDto> {
        Ok(CreateAgentFromTemplateInput {
            project,
            template_id: parse_template_id(&self.template_id)?,
            name: self.name,
            synchronized: self.synchronized,
        })
    }
}

/// One drifting agent, as seen by the frontend.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct AgentDriftDto {
    /// The drifting agent id (UUID string).
    pub agent_id: String,
    /// Version the agent is currently synced to.
    pub from: u64,
    /// Version available from the template.
    pub to: u64,
}

impl From<AgentDrift> for AgentDriftDto {
    fn from(d: AgentDrift) -> Self {
        Self {
            agent_id: d.agent_id.to_string(),
            from: d.from.get(),
            to: d.to.get(),
        }
    }
}

/// Response DTO for `detect_agent_drift` (transparent array on the wire).
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct AgentDriftListDto(pub Vec<AgentDriftDto>);

impl From<DetectAgentDriftOutput> for AgentDriftListDto {
    fn from(out: DetectAgentDriftOutput) -> Self {
        Self(out.drifts.into_iter().map(AgentDriftDto::from).collect())
    }
}

/// Response DTO for `sync_agent_with_template`.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct SyncResultDto {
    /// Whether a sync was actually applied.
    pub synced: bool,
    /// The version the agent is now at (`null` when no sync happened).
    pub version: Option<u64>,
}

impl From<SyncAgentWithTemplateOutput> for SyncResultDto {
    fn from(out: SyncAgentWithTemplateOutput) -> Self {
        Self {
            synced: out.synced,
            version: out.version.map(|v| v.get()),
        }
    }
}

/// Request DTO for `sync_agent_with_template`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SyncAgentWithTemplateRequestDto {
    /// Id of the owning project.
    pub project_id: String,
    /// Id of the agent to sync.
    pub agent_id: String,
}

// ---------------------------------------------------------------------------
// Git (L8)
// ---------------------------------------------------------------------------

use application::{
    GitBranchesOutput, GitCommitOutput, GitLogOutput, GitStatusOutput,
};
use domain::ports::{GitCommitInfo, GitFileStatus, GraphCommit};

/// One changed path returned by `git_status`.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct GitFileStatusDto {
    /// Repo-relative path.
    pub path: String,
    /// Whether the change is staged.
    pub staged: bool,
}

impl From<GitFileStatus> for GitFileStatusDto {
    fn from(s: GitFileStatus) -> Self {
        Self {
            path: s.path,
            staged: s.staged,
        }
    }
}

/// Response DTO for `git_status` (transparent array on the wire).
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct GitStatusListDto(pub Vec<GitFileStatusDto>);

impl From<GitStatusOutput> for GitStatusListDto {
    fn from(out: GitStatusOutput) -> Self {
        Self(out.entries.into_iter().map(GitFileStatusDto::from).collect())
    }
}

/// A single commit summary crossing the wire.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct GitCommitDto {
    /// Commit hash.
    pub hash: String,
    /// Commit message summary.
    pub summary: String,
}

impl From<GitCommitInfo> for GitCommitDto {
    fn from(c: GitCommitInfo) -> Self {
        Self {
            hash: c.hash,
            summary: c.summary,
        }
    }
}

impl From<GitCommitOutput> for GitCommitDto {
    fn from(out: GitCommitOutput) -> Self {
        Self::from(out.commit)
    }
}

/// Response DTO for `git_log` (transparent array on the wire).
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct GitCommitListDto(pub Vec<GitCommitDto>);

impl From<GitLogOutput> for GitCommitListDto {
    fn from(out: GitLogOutput) -> Self {
        Self(out.commits.into_iter().map(GitCommitDto::from).collect())
    }
}

/// Response DTO for `git_branches`.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct GitBranchesDto {
    /// All local branches.
    pub branches: Vec<String>,
    /// The current branch (`null` when detached or unborn).
    pub current: Option<String>,
}

impl From<GitBranchesOutput> for GitBranchesDto {
    fn from(out: GitBranchesOutput) -> Self {
        Self {
            branches: out.branches,
            current: out.current,
        }
    }
}

/// A single commit enriched for graph display.
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct GraphCommitDto {
    /// Full commit hash.
    pub hash: String,
    /// First line of the commit message.
    pub summary: String,
    /// Parent commit hashes.
    pub parents: Vec<String>,
    /// Ref labels pointing at this commit (e.g. `"main"`, `"tag: v1.0"`).
    pub refs: Vec<String>,
    /// Author name.
    pub author: String,
    /// Author timestamp in Unix seconds.
    pub timestamp: i64,
}

impl From<GraphCommit> for GraphCommitDto {
    fn from(c: GraphCommit) -> Self {
        Self {
            hash: c.hash,
            summary: c.summary,
            parents: c.parents,
            refs: c.refs,
            author: c.author,
            timestamp: c.timestamp,
        }
    }
}

/// Response DTO for `git_graph` (transparent array on the wire).
#[derive(Debug, Clone, Serialize)]
#[serde(transparent)]
pub struct GraphCommitListDto(pub Vec<GraphCommitDto>);

impl From<GitGraphOutput> for GraphCommitListDto {
    fn from(out: GitGraphOutput) -> Self {
        Self(out.commits.into_iter().map(GraphCommitDto::from).collect())
    }
}

/// Request DTO for `git_stage` / `git_unstage`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct GitStageRequestDto {
    /// Id of the owning project.
    pub project_id: String,
    /// Repo-relative path to (un)stage.
    pub path: String,
}

/// Request DTO for `git_commit`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct GitCommitRequestDto {
    /// Id of the owning project.
    pub project_id: String,
    /// Commit message.
    pub message: String,
}

/// Request DTO for `git_checkout`.
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct GitCheckoutRequestDto {
    /// Id of the owning project.
    pub project_id: String,
    /// Branch to check out.
    pub branch: String,
}

// ---------------------------------------------------------------------------
// Windows (L10)
// ---------------------------------------------------------------------------

use application::MoveTabToNewWindowOutput;
use domain::ids::TabId;

/// Response DTO for `move_tab_to_new_window`: the id minted for the new window
/// (used as the new OS window's label).
#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct MoveTabResultDto {
    /// The new window id (UUID string).
    pub new_window_id: String,
}

impl From<MoveTabToNewWindowOutput> for MoveTabResultDto {
    fn from(out: MoveTabToNewWindowOutput) -> Self {
        Self {
            new_window_id: out.new_window_id.to_string(),
        }
    }
}

/// Parses a tab-id string (UUID) coming from the frontend.
///
/// # Errors
/// Returns an [`ErrorDto`] with code `INVALID` if the string is not a UUID.
pub fn parse_tab_id(raw: &str) -> Result<TabId, ErrorDto> {
    uuid::Uuid::parse_str(raw)
        .map(TabId::from_uuid)
        .map_err(|_| ErrorDto {
            code: "INVALID".to_owned(),
            message: format!("invalid tab id: {raw}"),
        })
}