package controller

import (
	"net/http"
	"strconv"
	"time"

	"github.com/gin-gonic/gin"

	"nl-pms-api/internal/commonservice"
	"nl-pms-api/internal/middleware"
	"nl-pms-api/internal/service"
)

// AdminController 运营后台。
type AdminController struct {
	Admin *service.AdminService
	Sec   *service.AdminSecurityService
	Rel   *service.ReleaseService
	Act   *service.ActivityService
}

func (h *AdminController) Overview(c *gin.Context) {
	days, _ := strconv.Atoi(c.DefaultQuery("days", "14"))
	out, err := h.Admin.Overview(days)
	if err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, out)
}

func (h *AdminController) ListUsers(c *gin.Context) {
	items, err := h.Admin.ListUsers()
	if err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{"items": items})
}

func (h *AdminController) PatchUser(c *gin.Context) {
	id := commonservice.ParseID(c.Param("id"))
	var req struct {
		AIBanned *int `json:"aiBanned"`
		Disabled *int `json:"disabled"`
	}
	if !bindJSON(c, &req) {
		return
	}
	if err := h.Admin.PatchUser(commonservice.UserID(c), id, req.AIBanned, req.Disabled); err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{"ok": true})
}

func (h *AdminController) ListTeams(c *gin.Context) {
	items, err := h.Admin.ListTeams()
	if err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{"items": items})
}

func (h *AdminController) PatchTeam(c *gin.Context) {
	id := commonservice.ParseID(c.Param("id"))
	var req struct {
		AIBanned *int `json:"aiBanned"`
	}
	if !bindJSON(c, &req) {
		return
	}
	if err := h.Admin.PatchTeam(commonservice.UserID(c), id, req.AIBanned); err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{"ok": true})
}

func (h *AdminController) TOTPStatus(c *gin.Context) {
	out, err := h.Sec.Status(commonservice.UserID(c))
	if err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, out)
}

func (h *AdminController) TOTPSetupBegin(c *gin.Context) {
	out, err := h.Sec.SetupBegin(commonservice.UserID(c))
	if err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, out)
}

func (h *AdminController) TOTPSetupConfirm(c *gin.Context) {
	var req struct {
		Code string `json:"code"`
	}
	if !bindJSON(c, &req) {
		return
	}
	if err := h.Sec.SetupConfirm(commonservice.UserID(c), req.Code); err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{"ok": true})
}

func (h *AdminController) StepUp(c *gin.Context) {
	var req struct {
		Code string `json:"code"`
	}
	if !bindJSON(c, &req) {
		return
	}
	token, exp, err := h.Sec.StepUp(commonservice.UserID(c), req.Code, middleware.ClientIP(c))
	if err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"stepupToken": token,
		"expiresAt":   exp.UTC().Format(time.RFC3339),
	})
}

func (h *AdminController) ListReleases(c *gin.Context) {
	items, err := h.Rel.List(c.Query("channel"))
	if err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{"items": items})
}

func (h *AdminController) UploadRelease(c *gin.Context) {
	version := c.PostForm("version")
	channel := c.PostForm("channel")
	changelog := c.PostForm("changelog")
	fh, err := c.FormFile("file")
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "FILE_REQUIRED"})
		return
	}
	f, err := fh.Open()
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "FILE_REQUIRED"})
		return
	}
	defer f.Close()
	row, err := h.Rel.Upload(version, channel, changelog, f, fh.Size)
	if err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, row)
}

func (h *AdminController) PublishRelease(c *gin.Context) {
	id := commonservice.ParseID(c.Param("id"))
	row, err := h.Rel.Publish(id)
	if err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, row)
}

// ActivityController 日活心跳。
type ActivityController struct {
	Svc *service.ActivityService
}

func (h *ActivityController) Ping(c *gin.Context) {
	if err := h.Svc.Ping(commonservice.UserID(c), middleware.ClientIP(c)); err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{"ok": true})
}

// AIController AI 策略与用量上报。
type AIController struct {
	Admin *service.AdminService
}

func (h *AIController) Policy(c *gin.Context) {
	out, err := h.Admin.GetAIPolicy(commonservice.UserID(c))
	if err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, out)
}

func (h *AIController) Usage(c *gin.Context) {
	var req struct {
		Provider         string `json:"provider"`
		TeamID           int64  `json:"teamId"`
		PromptTokens     int64  `json:"promptTokens"`
		CompletionTokens int64  `json:"completionTokens"`
		Estimated        bool   `json:"estimated"`
	}
	if !bindJSON(c, &req) {
		return
	}
	if err := h.Admin.ReportAIUsage(commonservice.UserID(c), req.TeamID, req.Provider, req.PromptTokens, req.CompletionTokens, req.Estimated); err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{"ok": true})
}

// AppController 客户端更新检查/下载。
type AppController struct {
	Rel *service.ReleaseService
}

func (h *AppController) Latest(c *gin.Context) {
	out, err := h.Rel.Latest(c.DefaultQuery("channel", "stable"))
	if err != nil {
		writeErr(c, err)
		return
	}
	c.JSON(http.StatusOK, out)
}

func (h *AppController) Download(c *gin.Context) {
	row, f, err := h.Rel.OpenFile(c.Param("version"), c.DefaultQuery("channel", "stable"))
	if err != nil {
		writeErr(c, err)
		return
	}
	defer f.Close()
	c.Header("Content-Type", "application/octet-stream")
	c.Header("Content-Disposition", `attachment; filename="`+row.Version+`-installer.exe"`)
	c.Header("X-Content-SHA256", row.SHA256)
	http.ServeContent(c.Writer, c.Request, row.Version+"-installer.exe", time.Time{}, f)
}