package handler

import (
	"encoding/json"
	"net/http"
	"strconv"

	"aiaa-notification-service/internal/cache"
	"aiaa-notification-service/internal/model"
	"aiaa-notification-service/internal/store"

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

type ChannelHandler struct {
	store *store.Store
	cache *cache.Cache
}

func NewChannelHandler(s *store.Store, c *cache.Cache) *ChannelHandler {
	return &ChannelHandler{store: s, cache: c}
}

type createChannelReq struct {
	Name   string          `json:"name"   binding:"required"`
	Type   string          `json:"type"   binding:"required"`
	Config json.RawMessage `json:"config" binding:"required"`
	Status int             `json:"status"`
}

func (h *ChannelHandler) Create(c *gin.Context) {
	var req createChannelReq
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	if req.Status == 0 {
		req.Status = 1
	}
	raw := json.RawMessage(req.Config)
	ch := &model.Channel{Name: req.Name, Type: req.Type, Config: &raw, Status: req.Status}
	if err := h.store.CreateChannel(c.Request.Context(), ch); err != nil {
		c.JSON(http.StatusConflict, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusCreated, ch)
}

func (h *ChannelHandler) List(c *gin.Context) {
	var page store.PageFilter
	if err := c.ShouldBindQuery(&page); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	page.Normalize()

	channels, total, err := h.store.ListChannels(c.Request.Context(), page)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"data": channels, "total": total, "page": page.Page})
}

func (h *ChannelHandler) Get(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))
	ch, err := h.store.GetChannel(c.Request.Context(), id)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "channel not found"})
		return
	}
	c.JSON(http.StatusOK, ch)
}

func (h *ChannelHandler) Update(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))
	var req createChannelReq
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	raw := json.RawMessage(req.Config)
	ch := &model.Channel{Name: req.Name, Type: req.Type, Config: &raw, Status: req.Status}
	if err := h.store.UpdateChannel(c.Request.Context(), id, ch); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"ok": true})
}

func (h *ChannelHandler) Delete(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))
	if err := h.store.DeleteChannel(c.Request.Context(), id); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"ok": true})
}