use super::*;

fn build_service() -> AiTaskService {
    AiTaskService::new(InMemoryAiTaskStore::default())
}

fn build_create_input(task_kind: AiTaskKind) -> AiTaskCreateInput {
    AiTaskCreateInput {
        task_id: generate_ai_task_id(1_713_680_000_000_000),
        task_kind,
        owner_user_id: "user_001".to_string(),
        request_label: "首轮故事生成".to_string(),
        source_module: "story".to_string(),
        source_entity_id: Some("storysess_001".to_string()),
        request_payload_json: Some("{\"scene\":\"camp\"}".to_string()),
        stages: task_kind.default_stage_blueprints(),
        created_at_micros: 1_713_680_000_000_000,
    }
}

#[test]
fn default_stage_blueprints_match_story_baseline() {
    let stages = AiTaskKind::StoryGeneration.default_stage_blueprints();

    assert_eq!(stages.len(), 4);
    assert_eq!(stages[0].stage_kind, AiTaskStageKind::PreparePrompt);
    assert_eq!(stages[1].stage_kind, AiTaskStageKind::RequestModel);
    assert_eq!(stages[2].stage_kind, AiTaskStageKind::RepairResponse);
    assert_eq!(stages[3].stage_kind, AiTaskStageKind::NormalizeResult);
}

#[test]
fn create_task_rejects_duplicate_stage_blueprints() {
    let mut input = build_create_input(AiTaskKind::StoryGeneration);
    input.stages.push(AiTaskStageBlueprint {
        stage_kind: AiTaskStageKind::PreparePrompt,
        label: "重复阶段".to_string(),
        detail: "重复阶段".to_string(),
        order: 99,
    });

    let error = validate_task_create_input(&input).expect_err("duplicate stages should fail");
    assert_eq!(error, AiTaskFieldError::DuplicateStageBlueprint);
}

#[test]
fn generate_ai_task_stage_id_contains_task_and_stage_slug() {
    let stage_id = generate_ai_task_stage_id("aitask_demo", AiTaskStageKind::NormalizeResult);

    assert_eq!(stage_id, "aistage_aitask_demo_normalize_result");
}

#[test]
fn create_and_start_task_updates_status() {
    let service = build_service();
    let created = service
        .create_task(build_create_input(AiTaskKind::QuestIntent))
        .expect("task should create");
    let started = service
        .start_task(&created.task_id, created.created_at_micros + 1)
        .expect("task should start");

    assert_eq!(created.status, AiTaskStatus::Pending);
    assert_eq!(started.status, AiTaskStatus::Running);
    assert_eq!(
        started.started_at_micros,
        Some(created.created_at_micros + 1)
    );
    assert_eq!(started.version, INITIAL_AI_TASK_VERSION + 1);
}

#[test]
fn append_text_chunk_aggregates_stream_output_by_stage() {
    let service = build_service();
    let task = service
        .create_task(build_create_input(AiTaskKind::CharacterChat))
        .expect("task should create");
    service
        .start_stage(
            &task.task_id,
            AiTaskStageKind::RequestModel,
            task.created_at_micros + 10,
        )
        .expect("stage should start");

    let (after_first, _) = service
        .append_text_chunk(
            &task.task_id,
            AiTaskStageKind::RequestModel,
            1,
            "你".to_string(),
            task.created_at_micros + 20,
        )
        .expect("first chunk should append");
    let (after_second, second_chunk) = service
        .append_text_chunk(
            &task.task_id,
            AiTaskStageKind::RequestModel,
            2,
            "好。".to_string(),
            task.created_at_micros + 30,
        )
        .expect("second chunk should append");

    assert_eq!(after_first.latest_text_output.as_deref(), Some("你"));
    assert_eq!(after_second.latest_text_output.as_deref(), Some("你好。"));
    assert_eq!(second_chunk.sequence, 2);
}

#[test]
fn complete_stage_updates_latest_outputs() {
    let service = build_service();
    let task = service
        .create_task(build_create_input(AiTaskKind::StoryGeneration))
        .expect("task should create");

    let completed = service
        .complete_stage(AiStageCompletionInput {
            task_id: task.task_id.clone(),
            stage_kind: AiTaskStageKind::NormalizeResult,
            text_output: Some("营地前的篝火重新亮了起来。".to_string()),
            structured_payload_json: Some("{\"choices\":3}".to_string()),
            warning_messages: vec!["使用了 fallback 选项池".to_string()],
            completed_at_micros: task.created_at_micros + 50,
        })
        .expect("stage should complete");

    let stage = completed
        .stages
        .iter()
        .find(|stage| stage.stage_kind == AiTaskStageKind::NormalizeResult)
        .expect("normalize stage should exist");
    assert_eq!(stage.status, AiTaskStageStatus::Completed);
    assert_eq!(
        completed.latest_text_output.as_deref(),
        Some("营地前的篝火重新亮了起来。")
    );
    assert_eq!(
        completed.latest_structured_payload_json.as_deref(),
        Some("{\"choices\":3}")
    );
    assert_eq!(stage.warning_messages, vec!["使用了 fallback 选项池"]);
}

#[test]
fn attach_result_reference_appends_binding() {
    let service = build_service();
    let task = service
        .create_task(build_create_input(AiTaskKind::CustomWorldGeneration))
        .expect("task should create");

    let updated = service
        .attach_result_reference(
            &task.task_id,
            AiResultReferenceKind::CustomWorldProfile,
            "profile_001".to_string(),
            Some("主世界档案".to_string()),
            task.created_at_micros + 10,
        )
        .expect("reference should attach");

    assert_eq!(updated.result_references.len(), 1);
    assert_eq!(
        updated.result_references[0].reference_kind,
        AiResultReferenceKind::CustomWorldProfile
    );
    assert_eq!(updated.result_references[0].reference_id, "profile_001");
}

#[test]
fn fail_and_cancel_task_move_into_terminal_states() {
    let service = build_service();
    let first = service
        .create_task(build_create_input(AiTaskKind::NpcChat))
        .expect("task should create");
    let failed = service
        .fail_task(
            &first.task_id,
            "上游模型超时".to_string(),
            first.created_at_micros + 10,
        )
        .expect("task should fail");

    assert_eq!(failed.status, AiTaskStatus::Failed);
    assert_eq!(failed.failure_message.as_deref(), Some("上游模型超时"));

    let second = service
        .create_task(AiTaskCreateInput {
            task_id: generate_ai_task_id(1_713_680_000_000_999),
            ..build_create_input(AiTaskKind::RuntimeItemIntent)
        })
        .expect("second task should create");
    let cancelled = service
        .cancel_task(&second.task_id, second.created_at_micros + 20)
        .expect("task should cancel");

    assert_eq!(cancelled.status, AiTaskStatus::Cancelled);
    assert_eq!(
        cancelled.completed_at_micros,
        Some(second.created_at_micros + 20)
    );
}

#[test]
fn complete_task_marks_terminal_success() {
    let service = build_service();
    let task = service
        .create_task(build_create_input(AiTaskKind::QuestIntent))
        .expect("task should create");

    let completed = service
        .complete_task(&task.task_id, task.created_at_micros + 100)
        .expect("task should complete");

    assert_eq!(completed.status, AiTaskStatus::Completed);
    assert_eq!(
        completed.completed_at_micros,
        Some(task.created_at_micros + 100)
    );
}