package handlers

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

	"git.haelnorr.com/h/golib/hws"
	"git.haelnorr.com/h/oslstats/internal/db"
	"git.haelnorr.com/h/oslstats/internal/view/page"
	"github.com/pkg/errors"
	"github.com/uptrace/bun"
)

func SeasonsPage(
	s *hws.Server,
	conn *bun.DB,
) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		ctx, cancel := context.WithTimeout(r.Context(), 15*time.Second)
		defer cancel()
		tx, err := conn.BeginTx(ctx, nil)
		if err != nil {
			throwInternalServiceError(s, w, r, "Database error", errors.Wrap(err, "conn.BeginTx"))
			return
		}
		defer tx.Rollback()
		var pageNum, perPage int
		var order bun.Order
		var orderBy string
		if pageStr := r.URL.Query().Get("page"); pageStr != "" {
			pageNum, err = strconv.Atoi(pageStr)
			if err != nil {
				throwBadRequest(s, w, r, "Invalid page number", err)
				return
			}
		}
		if perPageStr := r.URL.Query().Get("per_page"); perPageStr != "" {
			perPage, err = strconv.Atoi(perPageStr)
			if err != nil {
				throwBadRequest(s, w, r, "Invalid per_page number", err)
				return
			}
		}
		order = bun.Order(r.URL.Query().Get("order"))
		orderBy = r.URL.Query().Get("order_by")
		pageOpts := &db.PageOpts{
			Page:    pageNum,
			PerPage: perPage,
			Order:   order,
			OrderBy: orderBy,
		}
		seasons, err := db.ListSeasons(ctx, tx, pageOpts)
		if err != nil {
			throwInternalServiceError(s, w, r, "Database error", errors.Wrap(err, "db.ListSeasons"))
			return
		}
		tx.Commit()
		renderSafely(page.SeasonsPage(seasons), s, r, w)
	})
}

func SeasonsList(
	s *hws.Server,
	conn *bun.DB,
) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		ctx, cancel := context.WithTimeout(r.Context(), 15*time.Second)
		defer cancel()

		// Parse form values
		if err := r.ParseForm(); err != nil {
			throwBadRequest(s, w, r, "Invalid form data", err)
			return
		}

		// Extract pagination/sort params from form
		var pageNum, perPage int
		var order bun.Order
		var orderBy string
		var err error

		if pageStr := r.FormValue("page"); pageStr != "" {
			pageNum, err = strconv.Atoi(pageStr)
			if err != nil {
				throwBadRequest(s, w, r, "Invalid page number", err)
				return
			}
		}
		if perPageStr := r.FormValue("per_page"); perPageStr != "" {
			perPage, err = strconv.Atoi(perPageStr)
			if err != nil {
				throwBadRequest(s, w, r, "Invalid per_page number", err)
				return
			}
		}
		order = bun.Order(r.FormValue("order"))
		orderBy = r.FormValue("order_by")

		pageOpts := &db.PageOpts{
			Page:    pageNum,
			PerPage: perPage,
			Order:   order,
			OrderBy: orderBy,
		}
		fmt.Println(pageOpts)

		// Database query
		tx, err := conn.BeginTx(ctx, nil)
		if err != nil {
			throwInternalServiceError(s, w, r, "Database error", errors.Wrap(err, "conn.BeginTx"))
			return
		}
		defer tx.Rollback()

		seasons, err := db.ListSeasons(ctx, tx, pageOpts)
		if err != nil {
			throwInternalServiceError(s, w, r, "Database error", errors.Wrap(err, "db.ListSeasons"))
			return
		}
		tx.Commit()

		// Return only the list component (hx-push-url handles URL update client-side)
		renderSafely(page.SeasonsList(seasons), s, r, w)
	})
}