// Package webui 渲染采购服务当前可用的服务端页面。
package webui

import (
	"embed"
	"html/template"
	"io"
	"time"

	"cmbuyer/admin/internal/tasks"
)

//go:embed templates/*.html
var templateFiles embed.FS

//go:embed static/tasks.js
var tasksScript []byte

var shanghaiLocation = time.FixedZone("Asia/Shanghai", 8*60*60)

var templates = template.Must(template.New("webui").Funcs(template.FuncMap{
	"list":             func(values ...any) []any { return values },
	"statusLabel":      statusLabel,
	"shanghaiDateTime": func(value time.Time) string { return value.In(shanghaiLocation).Format(time.RFC3339) },
	"shanghaiTime":     func(value time.Time) string { return value.In(shanghaiLocation).Format("2006-01-02 15:04") },
}).ParseFS(templateFiles, "templates/*.html"))

// LoginData 是登录页面所需的非敏感展示数据。
type LoginData struct {
	CSRFToken string
	ReturnTo  string
	Username  string
	Error     string
}

// TasksData 是受保护的建单与任务工作台页面所需数据。
type TasksData struct {
	CSRFToken    string
	Tasks        []tasks.TaskRow
	Filter       tasks.TaskFilter
	FilterErrors tasks.Errors
	HasFilter    bool
	StartKey     string
	Form         tasks.Form
	Errors       tasks.Errors
	OpenForm     bool
	FullPage     bool
	FocusField   string
	Success      bool
}

// RenderLogin 写入登录页。
func RenderLogin(writer io.Writer, data LoginData) error {
	return templates.ExecuteTemplate(writer, "login.html", data)
}

// RenderTasks 写入登录后的受保护任务页。
func RenderTasks(writer io.Writer, data TasksData) error {
	return templates.ExecuteTemplate(writer, "tasks.html", data)
}

func TasksScript() []byte { return tasksScript }

func statusLabel(status string) string {
	labels := map[string]string{
		"DRAFT":                   "待开始",
		"PENDING":                 "已授权待领取",
		"CLAIMED":                 "已领取",
		"ORDERING":                "执行中",
		"NEEDS_MANUAL":            "待人工处理",
		"WAITING_PAYMENT":         "待付款",
		"RECONCILIATION_REQUIRED": "围栏后待调和",
		"SUCCEEDED":               "已完成",
		"FAILED":                  "失败",
		"CANCELED":                "已取消",
	}
	if label, ok := labels[status]; ok {
		return label
	}
	return "未知状态"
}