<?php

namespace App\Services;

use Illuminate\Support\Facades\DB;
use Carbon\Carbon;

class ZentaoService
{
    /**
     * 获取所有用户列表
     */
    public function getUsers(): array
    {
        try {
            $users = DB::connection('zentao')
                ->table('user')
                ->select('id', 'account', 'realname', 'dept')
                ->where('deleted', '0')
                ->orderBy('realname')
                ->get();

            return $users->map(function ($user) {
                return [
                    'id' => $user->id,
                    'account' => $user->account,
                    'realname' => $user->realname ?: $user->account,
                    'dept' => $user->dept,
                ];
            })->toArray();
        } catch (\Exception $e) {
            throw new \Exception('连接禅道数据库失败: ' . $e->getMessage());
        }
    }

    /**
     * 获取指定用户本周完成的任务
     */
    public function getWeeklyTasks(string $account, ?string $startDate = null, ?string $endDate = null): array
    {
        // 默认本周
        $start = $startDate ? Carbon::parse($startDate)->format('Y-m-d') . ' 00:00:00' : Carbon::now()->startOfWeek()->format('Y-m-d') . ' 00:00:00';
        $end = $endDate ? Carbon::parse($endDate)->format('Y-m-d') . ' 23:59:59' : Carbon::now()->endOfWeek()->format('Y-m-d') . ' 23:59:59';

        try {
            // 查询本周完成的任务 - 根据finishedDate完成时间判断
            $tasks = DB::connection('zentao')
                ->table('task')
                ->leftJoin('project', 'task.project', '=', 'project.id')
                ->select(
                    'task.id',
                    'task.name',
                    'task.desc',
                    'task.status',
                    'task.finishedDate',
                    'task.finishedBy',
                    'task.assignedTo',
                    'task.estimate',
                    'task.consumed',
                    'task.pri',
                    'project.name as projectName'
                )
                ->where('task.deleted', '0')
                ->where(function ($query) use ($account) {
                    // 任务完成人或指派人是该用户
                    $query->where('task.finishedBy', $account)
                          ->orWhere('task.assignedTo', $account);
                })
                ->where(function ($query) use ($start, $end) {
                    // 本周完成的任务（根据完成时间判断）
                    $query->where(function ($q) use ($start, $end) {
                        $q->whereIn('task.status', ['done', 'closed'])
                          ->where('task.finishedDate', '>=', $start)
                          ->where('task.finishedDate', '<=', $end)
                          ->where('task.finishedDate', '!=', '0000-00-00 00:00:00');
                    });
                })
                ->orderBy('task.finishedDate', 'desc')
                ->get();

            return $tasks->map(function ($task) {
                return [
                    'id' => $task->id,
                    'name' => $task->name,
                    'description' => $this->formatTaskDescription($task),
                    'status' => $this->translateStatus($task->status),
                    'projectName' => $task->projectName ?: '未分类',
                    'finishedDate' => $task->finishedDate,
                    'consumed' => $task->consumed,
                ];
            })->toArray();
        } catch (\Exception $e) {
            throw new \Exception('获取任务失败: ' . $e->getMessage());
        }
    }

    /**
     * 获取指定用户下周的任务（已分配但未完成）
     */
    public function getNextWeekTasks(string $account, ?string $startDate = null): array
    {
        // 下周开始时间
        $nextWeekStart = $startDate
            ? Carbon::parse($startDate)->addWeek()->startOfWeek()
            : Carbon::now()->addWeek()->startOfWeek();

        try {
            // 查询未完成的任务作为下周计划
            $tasks = DB::connection('zentao')
                ->table('task')
                ->leftJoin('project', 'task.project', '=', 'project.id')
                ->select(
                    'task.id',
                    'task.name',
                    'task.desc',
                    'task.status',
                    'task.deadline',
                    'task.estimate',
                    'task.pri',
                    'project.name as projectName'
                )
                ->where('task.assignedTo', $account)
                ->where('task.deleted', '0')
                ->whereIn('task.status', ['wait', 'doing', 'pause'])
                ->orderBy('task.pri')
                ->orderBy('task.deadline')
                ->limit(20)
                ->get();

            return $tasks->map(function ($task) {
                return [
                    'id' => $task->id,
                    'name' => $task->name,
                    'description' => $this->formatNextWeekTaskDescription($task),
                    'status' => $this->translateStatus($task->status),
                    'projectName' => $task->projectName ?: '未分类',
                    'deadline' => $task->deadline,
                    'estimate' => $task->estimate,
                ];
            })->toArray();
        } catch (\Exception $e) {
            throw new \Exception('获取下周任务失败: ' . $e->getMessage());
        }
    }

    /**
     * 格式化任务描述
     */
    private function formatTaskDescription($task): string
    {
        $desc = $task->name;

        if ($task->projectName) {
            $desc = "[{$task->projectName}] {$desc}";
        }

        return $desc;
    }

    /**
     * 格式化下周任务描述
     */
    private function formatNextWeekTaskDescription($task): string
    {
        $desc = $task->name;

        if ($task->projectName) {
            $desc = "[{$task->projectName}] {$desc}";
        }

        return $desc;
    }

    /**
     * 翻译任务状态
     */
    private function translateStatus(string $status): string
    {
        $map = [
            'wait' => '未开始',
            'doing' => '进行中',
            'done' => '已完成',
            'pause' => '已暂停',
            'cancel' => '已取消',
            'closed' => '已关闭',
        ];

        return $map[$status] ?? $status;
    }

    /**
     * 测试数据库连接
     */
    public function testConnection(): bool
    {
        try {
            DB::connection('zentao')->getPdo();
            return true;
        } catch (\Exception $e) {
            return false;
        }
    }
}