package daytask

import (
	"app/commons/model/entity"
	"app/commons/services"
	"fmt"
	"strings"
	"time"

	"github.com/gin-gonic/gin"
)

// TaskWithCategory 带分类信息的任务响应结构
type TaskWithCategory struct {
	entity.DtTask
	CategoryName string `json:"categoryName"`
	CategoryIcon string `json:"categoryIcon"`
	Platform     string `json:"platform"`
}

// HomeIndex 首页数据
func (s *Server) HomeIndex(c *gin.Context) {
	ctx := s.FromContext(c)
	db := s.DB()

	// 获取Banner列表
	banners := make([]*entity.DtBanner, 0)
	db.Model(&entity.DtBanner{}).
		Where("status = ? AND position = ?", 1, "home").
		Order("sort DESC, id DESC").
		Limit(5).
		Find(&banners)

	// 获取任务分类
	categories := make([]*entity.DtTaskCategory, 0)
	db.Model(&entity.DtTaskCategory{}).
		Where("status = ?", 1).
		Order("sort ASC").
		Find(&categories)

	// 获取推荐任务
	recommendTasks := make([]*entity.DtTask, 0)
	// 尝试使用 is_recommend 字段，如果字段不存在则降级处理
	if err := db.Model(&entity.DtTask{}).Where("status = ? AND is_recommend = ?", 1, 1).
		Order("sort DESC, id DESC").Limit(10).Find(&recommendTasks).Error; err != nil {
		if isColumnNotExistError(err) {
			// 字段不存在，使用降级查询（不筛选推荐）
			db.Model(&entity.DtTask{}).Where("status = ?", 1).
				Order("sort DESC, id DESC").Limit(10).Find(&recommendTasks)
		}
	}

	// 获取普通任务
	normalTasks := make([]*entity.DtTask, 0)
	// 尝试使用 is_top 字段，如果字段不存在则降级处理
	if err := db.Model(&entity.DtTask{}).Where("status = ? AND remain_count > 0", 1).
		Order("is_top DESC, created_at DESC").Limit(20).Find(&normalTasks).Error; err != nil {
		if isColumnNotExistError(err) {
			// 字段不存在，使用降级查询（不按置顶排序）
			db.Model(&entity.DtTask{}).Where("status = ? AND remain_count > 0", 1).
				Order("created_at DESC").Limit(20).Find(&normalTasks)
		}
	}

	ctx.OK(gin.H{
		"banners":        banners,
		"categories":     categories,
		"recommendTasks": recommendTasks,
		"normalTasks":    normalTasks,
	})
}

// HomeBanner Banner列表
func (s *Server) HomeBanner(c *gin.Context) {
	ctx := s.FromContext(c)
	db := s.DB()

	position := c.DefaultQuery("position", "home")

	banners := make([]*entity.DtBanner, 0)
	db.Model(&entity.DtBanner{}).
		Where("status = ? AND position = ?", 1, position).
		Order("sort DESC, id DESC").
		Find(&banners)

	ctx.OK(banners)
}

// HomeHall 大厅数据
func (s *Server) HomeHall(c *gin.Context) {
	ctx := s.FromContext(c)
	db := s.DB()

	// 平台发放收益统计
	var totalReward float64
	db.Model(&entity.DtUserTask{}).
		Where("status = ?", entity.UserTaskStatusCompleted).
		Select("COALESCE(SUM(reward_amount), 0)").
		Scan(&totalReward)

	// 已完成任务数
	var completedCount int64
	db.Model(&entity.DtUserTask{}).
		Where("status = ?", entity.UserTaskStatusCompleted).
		Count(&completedCount)

	// 任务列表
	paging := &services.Pagination{
		Current: ctx.QueryInt64("current", 1),
		Size:    ctx.QueryInt64("size", 20),
	}

	tasks := make([]*entity.DtTask, 0)
	query := db.Model(&entity.DtTask{}).
		Where("status = ? AND remain_count > 0", 1)

	query.Count(&paging.Total)
	paging.Computer()

	// 尝试使用 is_top 和 is_recommend 字段，如果字段不存在则降级处理
	fallbackQuery := db.Model(&entity.DtTask{}).Where("status = ? AND remain_count > 0", 1)
	if err := query.Order("is_top DESC, is_recommend DESC, created_at DESC").
		Offset(int(paging.Start)).
		Limit(int(paging.Size)).
		Find(&tasks).Error; err != nil {
		if isColumnNotExistError(err) {
			// 字段不存在，使用全新查询（不按置顶和推荐排序）
			fallbackQuery.Order("created_at DESC").
				Offset(int(paging.Start)).
				Limit(int(paging.Size)).
				Find(&tasks)
		}
	}

	// 获取所有分类信息并构建映射
	categoryMap := make(map[int64]*entity.DtTaskCategory)
	if len(tasks) > 0 {
		categoryIds := make([]int64, 0)
		for _, task := range tasks {
			categoryIds = append(categoryIds, task.CategoryId)
		}
		categories := make([]*entity.DtTaskCategory, 0)
		db.Where("id IN ?", categoryIds).Find(&categories)
		for _, cat := range categories {
			categoryMap[cat.Id] = cat
		}
	}

	// 构建带分类信息的任务列表
	tasksWithCategory := make([]*TaskWithCategory, 0, len(tasks))
	for _, task := range tasks {
		twc := &TaskWithCategory{
			DtTask: *task,
		}
		if cat, ok := categoryMap[task.CategoryId]; ok {
			twc.CategoryName = cat.Name
			twc.CategoryIcon = cat.Icon
			twc.Platform = cat.Platform
		}
		tasksWithCategory = append(tasksWithCategory, twc)
	}

	ctx.OK(gin.H{
		"totalReward":    totalReward,
		"completedCount": completedCount,
		"tasks":          tasksWithCategory,
		"paging":         paging,
	})
}

// TaskCategories 任务分类列表
func (s *Server) TaskCategories(c *gin.Context) {
	ctx := s.FromContext(c)
	db := s.DB()

	categories := make([]*entity.DtTaskCategory, 0)
	db.Model(&entity.DtTaskCategory{}).
		Where("status = ?", 1).
		Order("sort ASC").
		Find(&categories)

	ctx.OK(categories)
}

// TaskList 任务列表
func (s *Server) TaskList(c *gin.Context) {
	ctx := s.FromContext(c)
	db := s.DB()

	categoryId := ctx.QueryInt64("categoryId", 0)
	keyword := c.Query("keyword")

	paging := &services.Pagination{
		Current: ctx.QueryInt64("current", 1),
		Size:    ctx.QueryInt64("size", 20),
	}

	query := db.Model(&entity.DtTask{}).
		Where("status = ? AND remain_count > 0", 1)

	if categoryId > 0 {
		query = query.Where("category_id = ?", categoryId)
	}
	if keyword != "" {
		query = query.Where("title LIKE ?", "%"+keyword+"%")
	}

	query.Count(&paging.Total)
	paging.Computer()

	tasks := make([]*entity.DtTask, 0)
	// 尝试使用 is_top 和 is_recommend 字段，如果字段不存在则降级处理
	fallbackQuery := db.Model(&entity.DtTask{}).Where("status = ? AND remain_count > 0", 1)
	if categoryId > 0 {
		fallbackQuery = fallbackQuery.Where("category_id = ?", categoryId)
	}
	if keyword != "" {
		fallbackQuery = fallbackQuery.Where("title LIKE ?", "%"+keyword+"%")
	}
	if err := query.Order("is_top DESC, is_recommend DESC, created_at DESC").
		Offset(int(paging.Start)).
		Limit(int(paging.Size)).
		Find(&tasks).Error; err != nil {
		if isColumnNotExistError(err) {
			// 字段不存在，使用全新查询（不按置顶和推荐排序）
			fallbackQuery.Order("created_at DESC").
				Offset(int(paging.Start)).
				Limit(int(paging.Size)).
				Find(&tasks)
		}
	}

	// 获取所有分类信息并构建映射
	categoryMap := make(map[int64]*entity.DtTaskCategory)
	if len(tasks) > 0 {
		categoryIds := make([]int64, 0)
		for _, task := range tasks {
			categoryIds = append(categoryIds, task.CategoryId)
		}
		categories := make([]*entity.DtTaskCategory, 0)
		db.Where("id IN ?", categoryIds).Find(&categories)
		for _, cat := range categories {
			categoryMap[cat.Id] = cat
		}
	}

	// 构建带分类信息的任务列表
	tasksWithCategory := make([]*TaskWithCategory, 0, len(tasks))
	for _, task := range tasks {
		twc := &TaskWithCategory{
			DtTask: *task,
		}
		if cat, ok := categoryMap[task.CategoryId]; ok {
			twc.CategoryName = cat.Name
			twc.CategoryIcon = cat.Icon
			twc.Platform = cat.Platform
		}
		tasksWithCategory = append(tasksWithCategory, twc)
	}

	ctx.OK(gin.H{
		"list":   tasksWithCategory,
		"paging": paging,
	})
}

// TaskDetail 任务详情
func (s *Server) TaskDetail(c *gin.Context) {
	ctx := s.FromContext(c)
	db := s.DB()

	taskId := ctx.QueryInt64("id", 0)
	if taskId == 0 {
		ctx.Fail("task_id_required")
		return
	}

	// 获取任务
	task := &entity.DtTask{}
	if err := db.Where("id = ? AND status = ?", taskId, 1).First(task).Error; err != nil {
		ctx.Fail("task_not_found")
		return
	}

	// 获取任务分类
	category := &entity.DtTaskCategory{}
	db.Where("id = ?", task.CategoryId).First(category)

	// 获取任务步骤
	steps := make([]*entity.DtTaskStep, 0)
	db.Model(&entity.DtTaskStep{}).
		Where("task_id = ?", taskId).
		Order("step_no ASC, id ASC").
		Find(&steps)

	// 获取审核样例
	examples := make([]*entity.DtTaskExample, 0)
	db.Model(&entity.DtTaskExample{}).
		Where("task_id = ?", taskId).
		Order("id ASC").
		Find(&examples)

	// 获取用户领取状态
	var apply *entity.DtUserTask
	userId := ctx.UserId()
	if userId > 0 {
		userTask := &entity.DtUserTask{}
		if err := db.Where("user_id = ? AND task_id = ?", userId, taskId).
			Order("id DESC").First(userTask).Error; err == nil {

			// 如果任务已完成，需要检查是否可以再次领取
			if userTask.Status == entity.UserTaskStatusCompleted {
				canReClaim := true
				today := time.Now().Format("2006-01-02")

				// 检查每日限制
				if task.DailyLimit > 0 {
					var todayCount int64
					db.Model(&entity.DtUserTask{}).
						Where("user_id = ? AND task_id = ? AND DATE(FROM_UNIXTIME(created_at)) = ?",
							userId, taskId, today).
						Count(&todayCount)
					if int(todayCount) >= task.DailyLimit {
						canReClaim = false
					}
				}

				// 检查总限制
				if canReClaim && task.TotalLimit > 0 {
					var totalCount int64
					db.Model(&entity.DtUserTask{}).
						Where("user_id = ? AND task_id = ? AND status != ?",
							userId, taskId, entity.UserTaskStatusAbandoned).
						Count(&totalCount)
					if int(totalCount) >= task.TotalLimit {
						canReClaim = false
					}
				}

				if canReClaim {
					apply = nil
				} else {
					apply = userTask
				}
			} else {
				// 其他状态（进行中、待审核等）直接返回
				apply = userTask
			}
		}
	}

	ctx.OK(gin.H{
		"task":     task,
		"category": category,
		"steps":    steps,
		"examples": examples,
		"apply":    apply,
	})
}

// ConfigGet 获取配置
func (s *Server) ConfigGet(c *gin.Context) {
	ctx := s.FromContext(c)
	db := s.DB()

	key := c.Query("key")
	group := c.Query("group")

	if key != "" {
		// 获取单个配置
		config := &entity.DtConfig{}
		if err := db.Where("`key` = ?", key).First(config).Error; err != nil {
			ctx.Fail("config_not_found")
			return
		}
		ctx.OK(config.Value)
		return
	}

	if group != "" {
		// 获取分组配置
		configs := make([]*entity.DtConfig, 0)
		db.Where("`group` = ?", group).Order("sort ASC").Find(&configs)

		result := make(map[string]string)
		for _, cfg := range configs {
			result[cfg.Key] = cfg.Value
		}
		ctx.OK(result)
		return
	}

	ctx.Fail("key_or_group_required")
}

// CustomerService 客服配置
func (s *Server) CustomerService(c *gin.Context) {
	ctx := s.FromContext(c)
	db := s.DB()

	services := make([]*entity.DtCustomerService, 0)
	db.Model(&entity.DtCustomerService{}).
		Where("status = ?", 1).
		Order("sort ASC").
		Find(&services)

	ctx.OK(services)
}

// OAuthConfig 获取OAuth配置（公开接口，只返回客户端需要的信息）
func (s *Server) OAuthConfig(c *gin.Context) {
	ctx := s.FromContext(c)
	db := s.DB()

	result := make(map[string]string)

	// 获取 Google Client ID
	var googleConfig entity.DtConfig
	if err := db.Where("`key` = ?", entity.ConfigKeyGoogleClientId).First(&googleConfig).Error; err == nil {
		result["googleClientId"] = googleConfig.Value
	}

	// 获取 Zalo App ID
	var zaloConfig entity.DtConfig
	if err := db.Where("`key` = ?", entity.ConfigKeyZaloAppId).First(&zaloConfig).Error; err == nil {
		result["zaloAppId"] = zaloConfig.Value
	}

	// 获取 Telegram Bot Name
	var telegramConfig entity.DtConfig
	if err := db.Where("`key` = ?", entity.ConfigKeyTelegramBotName).First(&telegramConfig).Error; err == nil {
		result["telegramBotName"] = telegramConfig.Value
	} else {
		fmt.Printf("Telegram config error: %v, key: %s\n", err, entity.ConfigKeyTelegramBotName)
	}

	// 获取 Telegram Bot ID
	var telegramIdConfig entity.DtConfig
	if err := db.Where("`key` = ?", entity.ConfigKeyTelegramBotId).First(&telegramIdConfig).Error; err == nil {
		result["telegramBotId"] = telegramIdConfig.Value
	}

	// 获取 TikTok Client Key
	var tiktokConfig entity.DtConfig
	if err := db.Where("`key` = ?", entity.ConfigKeyTiktokClientKey).First(&tiktokConfig).Error; err == nil {
		result["tiktokClientKey"] = tiktokConfig.Value
	}

	// 获取 Facebook App ID
	var facebookConfig entity.DtConfig
	if err := db.Where("`key` = ?", entity.ConfigKeyFacebookAppId).First(&facebookConfig).Error; err == nil {
		result["facebookAppId"] = facebookConfig.Value
	}

	ctx.OK(result)
}

// isColumnNotExistError 检查是否是列不存在的错误
func isColumnNotExistError(err error) bool {
	if err == nil {
		return false
	}
	errStr := err.Error()
	// MySQL 错误 1054 表示列不存在
	return strings.Contains(errStr, "1054") || strings.Contains(errStr, "Unknown column")
}