package api

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

	"git.fabledsword.com/bvandeusen/minstrel/internal/apierror"
	"git.fabledsword.com/bvandeusen/minstrel/internal/db/dbq"
)

// handleGetMyHistory implements GET /api/me/history?limit=&offset=.
// Returns the authenticated user's listening history (newest first),
// excluding skipped events and quarantined tracks. Pagination is
// offset/limit; has_more = (len(rows) == limit) is a cheap heuristic
// that errs on the "true" side at the exact-end boundary.
func (h *handlers) handleGetMyHistory(w http.ResponseWriter, r *http.Request) {
	user, ok := requireUser(w, r)
	if !ok {
		return
	}

	limit, offset, perr := parsePaging(r.URL.Query())
	if perr != nil {
		writeErr(w, apierror.BadRequest("bad_paging", "invalid limit or offset"))
		return
	}

	rows, err := dbq.New(h.pool).ListUserHistory(r.Context(), dbq.ListUserHistoryParams{
		UserID: user.ID,
		Limit:  int32(limit),
		Offset: int32(offset),
	})
	if err != nil {
		h.logger.Error("api: list user history", "err", err)
		writeErr(w, apierror.InternalMsg("failed to load history", err))
		return
	}

	events := make([]HistoryEvent, 0, len(rows))
	for _, row := range rows {
		events = append(events, HistoryEvent{
			ID:       uuidToString(row.EventID),
			PlayedAt: row.StartedAt.Time,
			Track:    trackRefFrom(row.Track, row.AlbumTitle, row.ArtistName),
		})
	}

	resp := HistoryResponse{
		Events:  events,
		HasMore: len(rows) == limit,
	}

	w.Header().Set("Content-Type", "application/json")
	_ = json.NewEncoder(w).Encode(resp)
}
