// Package handler — subscription update + per-subscription site search.
package handler

import (
	"net/http"

	"github.com/gin-gonic/gin"

	"github.com/ShukeBta/MediaStationGo/internal/model"
	"github.com/ShukeBta/MediaStationGo/internal/service"
)

type subscriptionPatchReq struct {
	Name          *string `json:"name"`
	FeedURL       *string `json:"feed_url"`
	Filter        *string `json:"filter"`
	MediaType     *string `json:"media_type"`
	MediaCategory *string `json:"media_category"`
	SavePath      *string `json:"save_path"`
	SearchMode    *string `json:"search_mode"`
	IMDBID        *string `json:"imdb_id"`
	Resolution    *string `json:"resolution"`
	Quality       *string `json:"quality"`
	Effects       *string `json:"effects"`
	ReleaseGroups *string `json:"release_groups"`
	ExcludeWords  *string `json:"exclude_words"`
	WashPriority  *string `json:"wash_priority"`
	Priority      *int    `json:"priority"`
	Enabled       *bool   `json:"enabled"`
}

// updateSubscriptionHandler patches a subscription row.
func updateSubscriptionHandler(svc *service.Container) gin.HandlerFunc {
	return func(c *gin.Context) {
		var patch subscriptionPatchReq
		if err := c.ShouldBindJSON(&patch); err != nil {
			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
			return
		}
		updates := subscriptionPatchUpdates(patch)
		if len(updates) == 0 {
			c.Status(http.StatusNoContent)
			return
		}
		if err := svc.Repo.DB.WithContext(c.Request.Context()).
			Model(&model.Subscription{}).
			Where("id = ?", c.Param("id")).
			Updates(updates).Error; err != nil {
			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
			return
		}
		c.Status(http.StatusNoContent)
	}
}

func subscriptionPatchUpdates(patch subscriptionPatchReq) map[string]any {
	updates := map[string]any{}
	if patch.Name != nil {
		updates["name"] = *patch.Name
	}
	if patch.FeedURL != nil {
		updates["feed_url"] = *patch.FeedURL
	}
	if patch.Filter != nil {
		updates["filter"] = *patch.Filter
	}
	if patch.MediaType != nil {
		updates["media_type"] = *patch.MediaType
	}
	if patch.MediaCategory != nil {
		updates["media_category"] = *patch.MediaCategory
	}
	if patch.SavePath != nil {
		updates["save_path"] = *patch.SavePath
	}
	if patch.SearchMode != nil {
		updates["search_mode"] = *patch.SearchMode
	}
	if patch.IMDBID != nil {
		updates["imdb_id"] = *patch.IMDBID
	}
	if patch.Resolution != nil {
		updates["resolution"] = *patch.Resolution
	}
	if patch.Quality != nil {
		updates["quality"] = *patch.Quality
	}
	if patch.Effects != nil {
		updates["effects"] = *patch.Effects
	}
	if patch.ReleaseGroups != nil {
		updates["release_groups"] = *patch.ReleaseGroups
	}
	if patch.ExcludeWords != nil {
		updates["exclude_words"] = *patch.ExcludeWords
	}
	if patch.WashPriority != nil {
		updates["wash_priority"] = *patch.WashPriority
	}
	if patch.Priority != nil {
		updates["priority"] = *patch.Priority
	}
	if patch.Enabled != nil {
		updates["enabled"] = *patch.Enabled
	}
	return updates
}

// searchSubscriptionHandler runs a one-off keyword search against the
// configured tracker sites for the given subscription. We treat the
// subscription's filter as the search term; this lets the UI preview
// what would be queued without actually downloading anything.
func searchSubscriptionHandler(svc *service.Container) gin.HandlerFunc {
	return func(c *gin.Context) {
		var sub model.Subscription
		err := svc.Repo.DB.WithContext(c.Request.Context()).
			Where("id = ?", c.Param("id")).First(&sub).Error
		if err != nil {
			c.JSON(http.StatusNotFound, gin.H{"error": "subscription not found"})
			return
		}
		keyword := sub.Filter
		if keyword == "" {
			keyword = sub.Name
		}
		results, err := svc.Site.Search(c.Request.Context(), keyword)
		if err != nil {
			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
			return
		}
		c.JSON(http.StatusOK, gin.H{"items": results, "subscription": sub})
	}
}