package handler

import (
	"net/http"
	"time"

	"yingce/backend/internal/service"

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

func RegisterFinanceRoutes(r *gin.RouterGroup, svc *service.Service) {
	r.GET("/wallet", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		page, limit, err := parsePaginationQuery(c, 30)
		if err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		wallet, err := svc.Wallet(user, c.Query("type"), page, limit)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, wallet)
	})
	r.POST("/wallet/redeem", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		if !enforceRateLimit(c, "redeem:"+user.ID, 10, time.Hour) {
			return
		}
		var req struct {
			Code string `json:"code"`
		}
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		account, err := svc.RedeemCredits(user, req.Code, c.ClientIP())
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"account": account})
	})
	r.POST("/wallet/checkin", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		account, granted, err := svc.CheckinCredits(user)
		if err != nil {
			failService(c, err)
			return
		}
		if !granted {
			fail(c, http.StatusConflict, service.BadAuthRequest("今天已经签到过了"))
			return
		}
		ok(c, gin.H{"account": account, "granted": true})
	})

	r.GET("/admin/settings/linuxdo", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		setting, err := svc.AdminLinuxDOSetting(user)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"setting": setting})
	})
	r.PATCH("/admin/settings/linuxdo", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		var req service.LinuxDOSettingRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		setting, err := svc.UpdateLinuxDOSetting(user, req)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"setting": setting})
	})
	r.GET("/admin/settings/registration", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		setting, err := svc.AdminRegistrationSetting(user)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"setting": setting})
	})
	r.PATCH("/admin/settings/registration", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		var req service.RegistrationSettingRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		setting, err := svc.UpdateRegistrationSetting(user, req)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"setting": setting})
	})
	r.GET("/admin/settings/credits", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		policy, err := svc.AdminCreditPolicy(user)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"policy": policy})
	})
	r.PATCH("/admin/settings/credits", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		var req service.CreditPolicy
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		policy, err := svc.UpdateCreditPolicy(user, req)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"policy": policy})
	})
	r.GET("/admin/settings/email", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		setting, err := svc.AdminEmailSetting(user)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"setting": setting})
	})
	r.PATCH("/admin/settings/email", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		var req service.EmailSettingRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		setting, err := svc.UpdateEmailSetting(user, req)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"setting": setting})
	})

	r.GET("/admin/channels/:id/models", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		items, err := svc.AdminChannelModels(user, c.Param("id"))
		if err != nil {
			failService(c, err)
			return
		}
		models := make([]adminChannelModelResponse, 0, len(items))
		for _, item := range items {
			models = append(models, adminChannelModel(item))
		}
		ok(c, gin.H{"models": models})
	})
	r.POST("/admin/channels/:id/models/fetch", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		if !enforceRateLimit(c, "admin-channel-models-fetch:"+user.ID+":"+c.Param("id"), 10, time.Minute) {
			return
		}
		// 上游密钥只在 service 内使用；点击拉取时仅返回目录，确认后才写入渠道模型。
		models, err := svc.PreviewAdminChannelModels(c.Request.Context(), user, c.Param("id"))
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"models": models})
	})
	r.POST("/admin/channels/:id/models/import", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		if !enforceRateLimit(c, "admin-channel-models-import:"+user.ID+":"+c.Param("id"), 10, time.Minute) {
			return
		}
		c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, 64<<10)
		var req service.AdminChannelModelImportRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		result, err := svc.ImportAdminChannelModels(c.Request.Context(), user, c.Param("id"), req.Models)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, result)
	})
	r.POST("/admin/channels/:id/models/test", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		if !enforceRateLimit(c, "admin-channel-model-test:"+user.ID+":"+c.Param("id"), 5, time.Minute) {
			return
		}
		c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, 64<<10)
		var req service.ChannelModelRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		result, err := svc.TestAdminChannelModel(c.Request.Context(), user, c.Param("id"), req)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, result)
	})
	r.POST("/admin/channels/:id/models", func(c *gin.Context) {
		saveChannelModel(c, svc, "")
	})
	r.POST("/admin/channels/:id/models/batch-delete", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, 32<<10)
		var req struct {
			ModelIDs []string `json:"modelIds"`
		}
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		deleted, err := svc.DeleteAdminChannelModels(user, c.Param("id"), req.ModelIDs)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"deleted": deleted})
	})
	r.POST("/admin/channels/:id/models/batch-reprice", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, 2<<20)
		var req struct {
			Models []service.ChannelModelRepriceRequest `json:"models" binding:"required"`
		}
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		updated, err := svc.RepriceAdminChannelModels(user, c.Param("id"), req.Models)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"updated": updated})
	})
	r.PATCH("/admin/channels/:id/models/:modelId", func(c *gin.Context) {
		saveChannelModel(c, svc, c.Param("modelId"))
	})
	r.PATCH("/admin/channels/:id/models/:modelId/sort", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		var req service.ChannelModelSortRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		if err := svc.UpdateAdminChannelModelSort(user, c.Param("id"), c.Param("modelId"), req); err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"updated": true})
	})
	r.DELETE("/admin/channels/:id/models/:modelId", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		if err := svc.DeleteAdminChannelModel(user, c.Param("id"), c.Param("modelId")); err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"ok": true})
	})

	r.GET("/admin/redeem-batches", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		page, limit, err := parsePaginationQuery(c, 20)
		if err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		items, err := svc.AdminRedeemBatchPage(user, service.AdminListQuery{Keyword: c.Query("keyword"), Status: c.Query("validity"), Page: page, Limit: limit})
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, items)
	})
	r.POST("/admin/redeem-batches", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		if !enforceRateLimit(c, "redeem-batch-create:"+user.ID, 20, time.Hour) {
			return
		}
		c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, 64<<10)
		var req service.CreateRedeemBatchRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		result, err := svc.AdminCreateRedeemBatch(user, req)
		if err != nil {
			failService(c, err)
			return
		}
		c.Header("Cache-Control", "no-store")
		ok(c, result)
	})
	r.GET("/admin/redeem-batches/:id/codes", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		page, limit, err := parsePaginationQuery(c, 50)
		if err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		result, err := svc.AdminRedeemCodePage(user, c.Param("id"), c.Query("status"), page, limit)
		if err != nil {
			failService(c, err)
			return
		}
		c.Header("Cache-Control", "no-store")
		ok(c, result)
	})
	r.POST("/admin/redeem-batches/:id/disable", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		count, err := svc.AdminDisableRedeemBatch(user, c.Param("id"))
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"disabledCount": count})
	})
	r.POST("/admin/redeem-batches/:id/codes/:codeId/disable", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		if err := svc.AdminDisableRedeemCode(user, c.Param("id"), c.Param("codeId")); err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"ok": true})
	})
	r.POST("/admin/users/:id/credits/adjust", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		var req service.AdminCreditAdjustmentRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		account, err := svc.AdminAdjustCredits(user, c.Param("id"), req)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"account": account})
	})
	r.GET("/admin/billing-orders", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		page, limit, err := parsePaginationQuery(c, 20)
		if err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		items, err := svc.AdminBillingOrderPage(user, service.AdminListQuery{Keyword: c.Query("keyword"), Status: c.DefaultQuery("status", "review"), Page: page, Limit: limit})
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, items)
	})
	r.POST("/admin/billing-orders/batch-resolve", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, 64<<10)
		var req service.ResolveBillingBatchRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		result, err := svc.ResolveBillingOrders(user, req)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, result)
	})
	r.POST("/admin/billing-orders/:id/resolve", func(c *gin.Context) {
		user, err := currentUser(c, svc)
		if err != nil {
			failService(c, err)
			return
		}
		var req service.ResolveBillingRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			fail(c, http.StatusBadRequest, err)
			return
		}
		order, err := svc.ResolveBillingOrder(user, c.Param("id"), req)
		if err != nil {
			failService(c, err)
			return
		}
		ok(c, gin.H{"order": order})
	})
}

func saveChannelModel(c *gin.Context, svc *service.Service, id string) {
	user, err := currentUser(c, svc)
	if err != nil {
		failService(c, err)
		return
	}
	var req service.ChannelModelRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		fail(c, http.StatusBadRequest, err)
		return
	}
	item, err := svc.SaveAdminChannelModel(user, c.Param("id"), id, req)
	if err != nil {
		failService(c, err)
		return
	}
	ok(c, gin.H{"model": adminChannelModel(*item)})
}