package httpapi

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

	"github.com/descrybe/descrybe-v2/apps/api/internal/catalog"
	"github.com/descrybe/descrybe-v2/apps/api/internal/marketing"
)

func (s *Server) marketingService() *marketing.Service {
	return &marketing.Service{Pool: s.Pool, Feeds: s.Feeds}
}

func (s *Server) handleGetMarketingCalendar(w http.ResponseWriter, r *http.Request) {
	cid, _ := CompanyIDFromContext(r.Context())
	year := time.Now().UTC().Year()
	if y := r.URL.Query().Get("year"); y != "" {
		parsed, err := strconv.Atoi(y)
		if err != nil || parsed < 2000 || parsed > 2100 {
			Error(w, http.StatusBadRequest, "invalid year")
			return
		}
		year = parsed
	}
	prepared, err := s.marketingService().ListPreparedCampaigns(r.Context(), cid)
	if err != nil {
		Error(w, http.StatusInternalServerError, "list failed")
		return
	}
	JSON(w, http.StatusOK, map[string]any{
		"year":     year,
		"presets":  marketing.ListPresets(year),
		"prepared": prepared,
	})
}

func (s *Server) handlePrepareMarketingCalendar(w http.ResponseWriter, r *http.Request) {
	cid, _ := CompanyIDFromContext(r.Context())
	var body struct {
		PresetID string `json:"preset_id"`
		Year     int    `json:"year"`
		Format   string `json:"format"`
		ForceNew bool   `json:"force_new"`
	}
	if err := DecodeJSON(r, &body); err != nil {
		Error(w, http.StatusBadRequest, "invalid json")
		return
	}
	campaign, err := s.marketingService().PrepareCampaign(r.Context(), cid, marketing.PrepareInput{
		PresetID: marketing.PresetID(body.PresetID),
		Year:     body.Year,
		Format:   body.Format,
		ForceNew: body.ForceNew,
	})
	if err != nil {
		ClientOrLog(w, http.StatusBadRequest, "could not prepare campaign", err, marketing.ClientError)
		return
	}
	status := http.StatusOK
	if campaign.Created {
		status = http.StatusCreated
	}
	JSON(w, status, campaign)
}

func (s *Server) handleListProductQuality(w http.ResponseWriter, r *http.Request) {
	cid, _ := CompanyIDFromContext(r.Context())
	limit, offset := ParseLimitOffset(r)
	var minScore *int
	if raw := r.URL.Query().Get("min_score"); raw != "" {
		n, err := strconv.Atoi(raw)
		if err != nil {
			Error(w, http.StatusBadRequest, "invalid min_score")
			return
		}
		minScore = &n
	}

	f := catalog.ListFilter{
		Query:    QuerySearch(r),
		Status:   r.URL.Query().Get("status"),
		Category: r.URL.Query().Get("category"),
		FeedID:   firstNonEmpty(r.URL.Query().Get("feed_id"), r.URL.Query().Get("feedId")),
		Limit:    limit,
		Offset:   offset,
	}
	if f.Status == "" {
		f.Status = "completed"
	}

	items, total, err := s.Catalog.ListProcessedProductsDetailed(r.Context(), cid, f)
	if err != nil {
		Error(w, http.StatusInternalServerError, "list failed")
		return
	}

	out := make([]map[string]any, 0, len(items))
	for _, item := range items {
		q := marketing.ScoreFromProductMap(item)
		if minScore != nil && q.Score < *minScore {
			continue
		}
		out = append(out, map[string]any{
			"id":             item["id"],
			"product_id":     item["product_id"],
			"name":           firstNonEmpty(asMapString(item["processed_name"]), asMapString(item["name"])),
			"quality_score":  q.Score,
			"quality_grade":  q.Grade,
			"quality_checks": q.Checks,
		})
	}
	JSON(w, http.StatusOK, map[string]any{
		"products": out,
		"total":    total,
		"limit":    limit,
		"offset":   offset,
	})
}

func asMapString(v any) string {
	if s, ok := v.(string); ok {
		return s
	}
	return ""
}

func attachProductQuality(items []map[string]any) {
	for i := range items {
		q := marketing.ScoreFromProductMap(items[i])
		items[i]["quality_score"] = q.Score
		items[i]["quality_grade"] = q.Grade
		items[i]["quality_checks"] = q.Checks
		// Drop heavy fields used only for scoring when present on list payloads.
		delete(items[i], "mapped_data")
		delete(items[i], "attributes")
		delete(items[i], "processed_attributes")
		delete(items[i], "description")
		delete(items[i], "processed_description")
		delete(items[i], "meta_title")
		delete(items[i], "meta_description")
	}
}