package main

import (
	"log"
	"net/http"
	"strconv"

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

// MovieList 电影列表
func MovieList(c *gin.Context) {

	data := gin.H{}
	response := gin.H{
		"code":    http.StatusInternalServerError,
		"message": "",
		"data":    data,
	}
	defer c.JSON(0, response)

	category := c.Query("category")

	var movies []Movie
	if category != "" {
		cateidx, err := strconv.Atoi(category)
		if err != nil {
			log.Println(err)
			return
		}
		movies = categories[cateidx].Movies
	}

	var page int = 0
	spage := c.Query("page")
	if spage != "" {
		p, err := strconv.Atoi(spage)
		if err != nil {
			log.Println(err)
			return
		}
		page = p - 1
	}

	var limit int = 12
	slimit := c.Query("limit")
	if slimit != "" {
		l, err := strconv.Atoi(slimit)
		if err != nil {
			log.Println(err)
			return
		}
		limit = l
	}

	start := page * limit
	var end int = start + limit

	if start > len(movies) {
		start = len(movies)
	}
	if end > len(movies) {
		end = len(movies)
	}

	response["code"] = http.StatusOK

	data["items"] = movies[start:end]
	data["total"] = len(movies)
}