//! L7 tests for template & sync DTO (de)serialisation contract: camelCase on
//! the wire, `TemplateDto`/`TemplateListDto` shapes, `AgentDriftDto`/
//! `AgentDriftListDto`, `SyncResultDto`, request DTO deserialisation, and
//! `parse_template_id` error behaviour. No Tauri runtime required.

use app_tauri_lib::dto::{
    parse_template_id, AgentDriftDto, AgentDriftListDto, CreateAgentFromTemplateRequestDto,
    CreateTemplateRequestDto, SyncResultDto, TemplateDto, TemplateListDto,
    UpdateTemplateRequestDto,
};
use application::{
    AgentDrift, CreateTemplateOutput, DetectAgentDriftOutput, ListTemplatesOutput,
    SyncAgentWithTemplateOutput, UpdateTemplateOutput,
};
use domain::ids::{AgentId, ProfileId, TemplateId};
use domain::markdown::MarkdownDoc;
use domain::template::{AgentTemplate, TemplateVersion};
use serde_json::json;
use uuid::Uuid;

// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------

fn make_template(template_uuid: u128, profile_uuid: u128) -> AgentTemplate {
    AgentTemplate::new(
        TemplateId::from_uuid(Uuid::from_u128(template_uuid)),
        "My Template",
        MarkdownDoc::new("# Hello".to_owned()),
        ProfileId::from_uuid(Uuid::from_u128(profile_uuid)),
    )
    .expect("valid template")
}

// ---------------------------------------------------------------------------
// TemplateDto serialisation
// ---------------------------------------------------------------------------

#[test]
fn template_dto_serialises_camelcase() {
    let tmpl = make_template(1, 2);
    let dto = TemplateDto(tmpl.clone());
    let v = serde_json::to_value(&dto).unwrap();

    assert_eq!(v["id"], tmpl.id.to_string());
    assert_eq!(v["name"], "My Template");
    // contentMd is the camelCase field on AgentTemplate; MarkdownDoc is transparent → plain string
    assert_eq!(v["contentMd"], "# Hello");
    // version is a transparent number
    assert_eq!(v["version"], 1u64);
    assert_eq!(
        v["defaultProfileId"],
        ProfileId::from_uuid(Uuid::from_u128(2)).to_string()
    );
    // no snake_case leak
    assert!(v.get("content_md").is_none(), "no snake_case leak for contentMd");
    assert!(v.get("default_profile_id").is_none(), "no snake_case leak for defaultProfileId");
}

#[test]
fn template_dto_version_is_number() {
    let tmpl = make_template(3, 4);
    let dto = TemplateDto(tmpl);
    let v = serde_json::to_value(&dto).unwrap();
    assert!(v["version"].is_number(), "version should be a JSON number");
    assert_eq!(v["version"].as_u64().unwrap(), 1);
}

// ---------------------------------------------------------------------------
// TemplateListDto
// ---------------------------------------------------------------------------

#[test]
fn template_list_dto_is_transparent_array() {
    let out = ListTemplatesOutput {
        templates: vec![make_template(1, 2), make_template(3, 4)],
    };
    let dto = TemplateListDto::from(out);
    let v = serde_json::to_value(&dto).unwrap();
    let arr = v.as_array().expect("transparent array");
    assert_eq!(arr.len(), 2);
    assert_eq!(arr[0]["name"], "My Template");
    assert_eq!(arr[1]["name"], "My Template");
}

#[test]
fn template_list_dto_empty() {
    let out = ListTemplatesOutput { templates: vec![] };
    let dto = TemplateListDto::from(out);
    let v = serde_json::to_value(&dto).unwrap();
    assert!(v.as_array().unwrap().is_empty());
}

// ---------------------------------------------------------------------------
// From<CreateTemplateOutput> / From<UpdateTemplateOutput>
// ---------------------------------------------------------------------------

#[test]
fn create_template_output_maps_to_template_dto() {
    let tmpl = make_template(5, 6);
    let out = CreateTemplateOutput { template: tmpl.clone() };
    let dto = TemplateDto::from(out);
    assert_eq!(dto.0.id, tmpl.id);
}

#[test]
fn update_template_output_maps_to_template_dto() {
    let tmpl = make_template(7, 8);
    let bumped = tmpl.with_updated_content(MarkdownDoc::new("# Updated".to_owned()));
    let out = UpdateTemplateOutput { template: bumped.clone() };
    let dto = TemplateDto::from(out);
    assert_eq!(dto.0.version, TemplateVersion(2));
    assert_eq!(dto.0.id, bumped.id);
}

// ---------------------------------------------------------------------------
// AgentDriftDto / AgentDriftListDto serialisation
// ---------------------------------------------------------------------------

#[test]
fn agent_drift_dto_serialises_camelcase() {
    let agent_id = AgentId::from_uuid(Uuid::from_u128(10));
    let drift = AgentDrift {
        agent_id,
        from: TemplateVersion(1),
        to: TemplateVersion(3),
    };
    let dto = AgentDriftDto::from(drift);
    let v = serde_json::to_value(&dto).unwrap();

    assert_eq!(v["agentId"], agent_id.to_string());
    assert_eq!(v["from"], 1u64);
    assert_eq!(v["to"], 3u64);
    // no snake_case leak
    assert!(v.get("agent_id").is_none(), "no snake_case leak for agentId");
}

#[test]
fn agent_drift_list_dto_is_transparent_array() {
    let agent_id = AgentId::from_uuid(Uuid::from_u128(11));
    let out = DetectAgentDriftOutput {
        drifts: vec![AgentDrift {
            agent_id,
            from: TemplateVersion(2),
            to: TemplateVersion(5),
        }],
    };
    let dto = AgentDriftListDto::from(out);
    let v = serde_json::to_value(&dto).unwrap();
    let arr = v.as_array().expect("transparent array");
    assert_eq!(arr.len(), 1);
    assert_eq!(arr[0]["from"], 2u64);
    assert_eq!(arr[0]["to"], 5u64);
}

#[test]
fn agent_drift_list_dto_empty() {
    let out = DetectAgentDriftOutput { drifts: vec![] };
    let dto = AgentDriftListDto::from(out);
    let v = serde_json::to_value(&dto).unwrap();
    assert!(v.as_array().unwrap().is_empty());
}

// ---------------------------------------------------------------------------
// SyncResultDto
// ---------------------------------------------------------------------------

#[test]
fn sync_result_dto_synced_with_version() {
    let out = SyncAgentWithTemplateOutput {
        synced: true,
        version: Some(TemplateVersion(4)),
    };
    let dto = SyncResultDto::from(out);
    let v = serde_json::to_value(&dto).unwrap();

    assert_eq!(v["synced"], true);
    assert_eq!(v["version"], 4u64);
}

#[test]
fn sync_result_dto_not_synced_version_null() {
    let out = SyncAgentWithTemplateOutput {
        synced: false,
        version: None,
    };
    let dto = SyncResultDto::from(out);
    let v = serde_json::to_value(&dto).unwrap();

    assert_eq!(v["synced"], false);
    assert!(v["version"].is_null(), "version should be null when None");
}

// ---------------------------------------------------------------------------
// Request DTO deserialisation
// ---------------------------------------------------------------------------

#[test]
fn create_template_request_deserialises_camelcase() {
    let profile_id = Uuid::from_u128(20).to_string();
    let raw = json!({
        "name": "Backend Template",
        "content": "# My context",
        "defaultProfileId": profile_id
    });
    let dto: CreateTemplateRequestDto = serde_json::from_value(raw).unwrap();
    assert_eq!(dto.name, "Backend Template");
    assert_eq!(dto.content, "# My context");
    assert_eq!(dto.default_profile_id, profile_id);
}

#[test]
fn update_template_request_deserialises_camelcase() {
    let template_id = Uuid::from_u128(30).to_string();
    let raw = json!({
        "templateId": template_id,
        "content": "# Updated content"
    });
    let dto: UpdateTemplateRequestDto = serde_json::from_value(raw).unwrap();
    assert_eq!(dto.template_id, template_id);
    assert_eq!(dto.content, "# Updated content");
}

#[test]
fn create_agent_from_template_request_deserialises_camelcase() {
    let project_id = Uuid::from_u128(40).to_string();
    let template_id = Uuid::from_u128(41).to_string();
    let raw = json!({
        "projectId": project_id,
        "templateId": template_id,
        "name": "My Agent",
        "synchronized": true
    });
    let dto: CreateAgentFromTemplateRequestDto = serde_json::from_value(raw).unwrap();
    assert_eq!(dto.project_id, project_id);
    assert_eq!(dto.template_id, template_id);
    assert_eq!(dto.name.as_deref(), Some("My Agent"));
    assert!(dto.synchronized);
}

#[test]
fn create_agent_from_template_request_name_defaults_to_none() {
    let raw = json!({
        "projectId": Uuid::nil().to_string(),
        "templateId": Uuid::nil().to_string(),
        "synchronized": false
    });
    let dto: CreateAgentFromTemplateRequestDto = serde_json::from_value(raw).unwrap();
    assert!(dto.name.is_none());
}

// ---------------------------------------------------------------------------
// parse_template_id
// ---------------------------------------------------------------------------

#[test]
fn parse_template_id_accepts_uuid() {
    let id = Uuid::from_u128(99);
    assert_eq!(
        parse_template_id(&id.to_string()).unwrap(),
        TemplateId::from_uuid(id)
    );
}

#[test]
fn parse_template_id_rejects_garbage() {
    let err = parse_template_id("INVALID").expect_err("garbage rejected");
    assert_eq!(err.code, "INVALID");
}

#[test]
fn parse_template_id_rejects_empty() {
    let err = parse_template_id("").expect_err("empty string rejected");
    assert_eq!(err.code, "INVALID");
}