import type { Bug, BugStatus } from './bug';
import type { DevTask, DevTaskStatus } from './dev-task';
import type { TestCase, TestCaseStatus } from './test-case';
import { REQUIREMENT_COVERAGE_LABEL, type VersionPlan, type VersionPlanLog } from './version-plan';
import type { WorkActivityDraft } from './work-activity';

const PLAN_TYPE_LABEL: Record<VersionPlan['type'], string> = {
  research: '调研',
  product: '产品方案',
  ui: 'UI设计',
};

export function makeVersionPlanCreatedActivity(plan: VersionPlan, actorId: string): WorkActivityDraft {
  return {
    actorId,
    sourceType: 'version_plan',
    sourceId: plan.id,
    action: 'version_plan_created',
    category: 'creation',
    title: plan.title,
    summary: `新建${PLAN_TYPE_LABEL[plan.type]}：${plan.title}`,
  };
}

export function makeVersionPlanStartedActivity(plan: VersionPlan, actorId: string): WorkActivityDraft {
  return {
    actorId,
    sourceType: 'version_plan',
    sourceId: plan.id,
    action: 'version_plan_started',
    category: 'progress',
    title: plan.title,
    summary: `开始${PLAN_TYPE_LABEL[plan.type]}：${plan.title}`,
  };
}

export function makeVersionPlanCompletedActivity(plan: VersionPlan, actorId: string): WorkActivityDraft {
  return {
    actorId,
    sourceType: 'version_plan',
    sourceId: plan.id,
    action: 'version_plan_completed',
    category: 'delivery',
    title: plan.title,
    summary: `完成${PLAN_TYPE_LABEL[plan.type]}：${plan.title}`,
  };
}

export function makeVersionPlanRequirementProgressActivity(plan: VersionPlan, log: VersionPlanLog): WorkActivityDraft | undefined {
  if (log.type !== 'requirement_progress') return undefined;
  if (plan.type !== 'product' && plan.type !== 'ui') return undefined;

  const requirementLabel = [log.requirementCode, log.requirementTitle].filter(Boolean).join(' ') || '需求';
  const statusLabel = log.coverageStatus ? REQUIREMENT_COVERAGE_LABEL[log.coverageStatus] : '进度更新';

  return {
    actorId: log.actor,
    sourceType: 'version_plan',
    sourceId: plan.id,
    action: 'version_plan_requirement_progress',
    category: 'progress',
    title: plan.title,
    summary: `推进${PLAN_TYPE_LABEL[plan.type]}需求：${requirementLabel}（${statusLabel}）`,
    occurredAt: log.createdAt,
    metadata: {
      requirementId: log.requirementId,
      requirementCode: log.requirementCode,
      requirementTitle: log.requirementTitle,
      coverageStatus: log.coverageStatus,
      completedContent: log.completedContent,
      remainingContent: log.remainingContent,
    },
  };
}

export function makeDevTaskCreatedActivity(task: DevTask, actorId: string): WorkActivityDraft {
  return {
    actorId,
    sourceType: 'dev_task',
    sourceId: task.id,
    action: 'dev_task_created',
    category: 'creation',
    title: task.title,
    summary: `新建开发任务：${task.title}`,
  };
}

export function makeDevTaskStatusActivity(
  task: DevTask,
  fromStatus: DevTaskStatus,
  toStatus: DevTaskStatus,
  actorId: string,
): WorkActivityDraft | undefined {
  const base = {
    actorId,
    sourceType: 'dev_task' as const,
    sourceId: task.id,
    title: task.title,
    metadata: { fromStatus, toStatus },
  };

  if (toStatus === 'in_progress') {
    return {
      ...base,
      action: 'dev_task_started',
      category: 'progress',
      summary: `开始开发：${task.title}`,
    };
  }

  if (toStatus === 'testing') {
    return {
      ...base,
      action: 'dev_task_self_testing',
      category: 'progress',
      summary: `进入自测：${task.title}`,
    };
  }

  if (toStatus === 'submitted') {
    return {
      ...base,
      action: 'dev_task_submitted',
      category: 'delivery',
      summary: `已提测开发任务：${task.title}`,
    };
  }

  return undefined;
}

export function makeDevTaskBlockedActivity(
  task: DevTask,
  actorId: string,
  reason?: string,
  helperId?: string,
): WorkActivityDraft {
  return {
    actorId,
    sourceType: 'dev_task',
    sourceId: task.id,
    action: 'dev_task_blocked',
    category: 'risk',
    title: task.title,
    summary: `标记阻塞：${reason?.trim() || task.title}`,
    metadata: {
      blocker: reason?.trim() || undefined,
      helperId: helperId?.trim() || undefined,
    },
  };
}

export function makeDevTaskUnblockedActivity(task: DevTask, actorId: string): WorkActivityDraft {
  return {
    actorId,
    sourceType: 'dev_task',
    sourceId: task.id,
    action: 'dev_task_unblocked',
    category: 'progress',
    title: task.title,
    summary: `解除阻塞：${task.title}`,
  };
}

export function makeBugCreatedActivity(bug: Bug, actorId: string): WorkActivityDraft {
  return {
    actorId,
    sourceType: 'bug',
    sourceId: bug.id,
    action: 'bug_created',
    category: 'creation',
    title: bug.title,
    summary: `新建 Bug：${bug.title}`,
  };
}

export function makeTestCaseCreatedActivity(testCase: TestCase, actorId: string): WorkActivityDraft {
  return {
    actorId,
    sourceType: 'test_case',
    sourceId: testCase.id,
    action: 'test_case_created',
    category: 'creation',
    title: testCase.title,
    summary: `新建测试用例：${testCase.title}`,
  };
}

export function makeTestCaseStatusActivity(
  testCase: TestCase,
  fromStatus: TestCaseStatus,
  toStatus: TestCaseStatus,
  actorId: string,
): WorkActivityDraft | undefined {
  const base = {
    actorId,
    sourceType: 'test_case' as const,
    sourceId: testCase.id,
    title: testCase.title,
    metadata: { fromStatus, toStatus },
  };

  if (toStatus === 'running') {
    return {
      ...base,
      action: 'test_case_started',
      category: 'progress',
      summary: `开始测试：${testCase.title}`,
    };
  }

  if (toStatus === 'passed') {
    return {
      ...base,
      action: 'test_case_passed',
      category: 'delivery',
      summary: `测试通过：${testCase.title}`,
    };
  }

  if (toStatus === 'failed') {
    return {
      ...base,
      action: 'test_case_failed',
      category: 'risk',
      summary: `测试不通过：${testCase.title}`,
    };
  }

  if (toStatus === 'blocked') {
    return {
      ...base,
      action: 'test_case_blocked',
      category: 'risk',
      summary: `测试阻塞：${testCase.title}`,
    };
  }

  return undefined;
}

export function makeBugStatusActivity(
  bug: Bug,
  fromStatus: BugStatus,
  toStatus: BugStatus,
  actorId: string,
): WorkActivityDraft | undefined {
  const base = {
    actorId,
    sourceType: 'bug' as const,
    sourceId: bug.id,
    title: bug.title,
    metadata: { fromStatus, toStatus },
  };

  if (toStatus === 'fixing') {
    return {
      ...base,
      action: 'bug_fixing',
      category: 'progress',
      summary: `开始修复 Bug：${bug.title}`,
    };
  }

  if (toStatus === 'fixed') {
    return {
      ...base,
      action: 'bug_fixed',
      category: 'delivery',
      summary: `已修复 Bug：${bug.title}`,
    };
  }

  if (toStatus === 'closed') {
    return {
      ...base,
      action: 'bug_closed',
      category: 'delivery',
      summary: `已关闭 Bug：${bug.title}`,
    };
  }

  return undefined;
}

export function makeBugTransferredActivity(bug: Bug, actorId: string, toAssigneeId: string): WorkActivityDraft {
  return {
    actorId,
    sourceType: 'bug',
    sourceId: bug.id,
    action: 'bug_transferred',
    category: 'progress',
    title: bug.title,
    summary: `转交 Bug：${bug.title} → ${toAssigneeId}`,
    metadata: { toAssigneeId },
  };
}