package cmd

import (
	"fmt"
	"os"
	"sort"

	"github.com/evil7/hostsync/core"
	"github.com/evil7/hostsync/utils"
	"github.com/spf13/cobra"
)

var (
	rawOutput bool
)

// listCmd 列表命令
var listCmd = &cobra.Command{
	Use:   "list [blockName]",
	Short: "查看 Hosts 配置",
	Long: `查看 Hosts 配置，可以列出所有块或指定块的配置。

示例:
  hostsync list              # 列出所有块配置
  hostsync list github       # 列出指定块配置
  hostsync list --raw        # 原始格式输出，便于导出`,
	Run: runList,
}

func init() {
	listCmd.Flags().BoolVar(&rawOutput, "raw", false, "原始格式输出")
}

func runList(cmd *cobra.Command, args []string) {
	hm := core.NewHostsManager()
	if err := hm.Load(); err != nil {
		utils.LogError("加载hosts文件失败: %v", err)
		os.Exit(1)
	}

	if len(args) == 0 {
		// 列出所有块
		listAllBlocks(hm)
	} else {
		// 列出指定块
		blockName := args[0]
		listBlock(hm, blockName)
	}
}

func listAllBlocks(hm *core.HostsManager) {
	if len(hm.Blocks) == 0 {
		utils.LogInfo("没有找到任何配置块")
		return
	}

	if rawOutput {
		// 获取排序后的块名称列表用于原始输出
		var blockNames []string
		for name := range hm.Blocks {
			blockNames = append(blockNames, name)
		}
		sort.Strings(blockNames)

		// 原始格式输出
		for _, name := range blockNames {
			block := hm.Blocks[name]
			utils.LogResult("# %s:\n", name)
			for _, entry := range block.Entries {
				prefix := ""
				if !entry.Enabled {
					prefix = "# "
				}
				if entry.Comment != "" {
					utils.LogResult("%s%-16s %s # %s\n", prefix, entry.IP, entry.Domain, entry.Comment)
				} else {
					utils.LogResult("%s%-16s %s\n", prefix, entry.IP, entry.Domain)
				}
			}
			if block.DNS != "" {
				utils.LogResult("# useDns: %s\n", block.DNS)
			}
			if block.DoH != "" {
				utils.LogResult("# useDoh: %s\n", block.DoH)
			}
			if block.Server != "" {
				utils.LogResult("# useSrv: %s\n", block.Server)
			}
			if block.CronJob != "" {
				utils.LogResult("# cronJob: %s\n", block.CronJob)
			}
			if !block.UpdateAt.IsZero() {
				utils.LogResult("# updateAt: %s\n", block.UpdateAt.Format("2006-01-02 15:04:05"))
			}
			utils.LogResult("# %s;\n\n", name)
		}
		return
	}

	// 表格格式输出
	headers := []string{"块名称", "状态", "条目数", "DNS配置", "最后更新"}
	var rows [][]string

	// 获取排序后的块名称列表
	var blockNames []string
	for name := range hm.Blocks {
		blockNames = append(blockNames, name)
	}
	sort.Strings(blockNames)

	for _, name := range blockNames {
		block := hm.Blocks[name]

		// 计算启用的条目数
		enabledCount := 0
		for _, entry := range block.Entries {
			if entry.Enabled {
				enabledCount++
			}
		}

		// 根据块状态和条目状态确定显示状态
		var status string
		if len(block.Entries) == 0 {
			status = "空块"
		} else if enabledCount == 0 {
			status = "全部禁用"
		} else if enabledCount == len(block.Entries) {
			status = "全部启用"
		} else {
			status = "部分启用"
		}

		entryInfo := fmt.Sprintf("%d/%d", enabledCount, len(block.Entries))

		dnsConfig := ""
		if block.DNS != "" {
			dnsConfig = fmt.Sprintf("DNS: %s", block.DNS)
		} else if block.DoH != "" {
			dnsConfig = fmt.Sprintf("DoH: %s", utils.TruncateWithWidth(block.DoH, 30))
		} else if block.Server != "" {
			dnsConfig = fmt.Sprintf("服务器: %s", block.Server)
		} else {
			dnsConfig = "系统默认"
		}

		updateTime := "从未更新"
		if !block.UpdateAt.IsZero() {
			updateTime = block.UpdateAt.Format("2006-01-02 15:04")
		}

		rows = append(rows, []string{name, status, entryInfo, dnsConfig, updateTime})
	}

	utils.LogInfo("Hosts 配置块列表 (%d 个块)\n", len(hm.Blocks))

	// 设置合适的列宽
	columnWidths := []int{12, 12, 8, 35, 17}
	utils.FormatTable(headers, rows, columnWidths)
}

func listBlock(hm *core.HostsManager, blockName string) {
	block := hm.GetBlock(blockName)
	if block == nil {
		utils.LogError("块不存在: %s", blockName)
		os.Exit(1)
	}

	if rawOutput {
		// 原始格式输出
		fmt.Printf("# %s:\n", blockName)
		for _, entry := range block.Entries {
			prefix := ""
			if !entry.Enabled {
				prefix = "# "
			}
			if entry.Comment != "" {
				fmt.Printf("%s%-16s %s # %s\n", prefix, entry.IP, entry.Domain, entry.Comment)
			} else {
				fmt.Printf("%s%-16s %s\n", prefix, entry.IP, entry.Domain)
			}
		}
		if block.DNS != "" {
			fmt.Printf("# useDns: %s\n", block.DNS)
		}
		if block.DoH != "" {
			fmt.Printf("# useDoh: %s\n", block.DoH)
		}
		if block.Server != "" {
			fmt.Printf("# useSrv: %s\n", block.Server)
		}
		if block.CronJob != "" {
			fmt.Printf("# cronJob: %s\n", block.CronJob)
		}
		if !block.UpdateAt.IsZero() {
			fmt.Printf("# updateAt: %s\n", block.UpdateAt.Format("2006-01-02 15:04:05"))
		}
		fmt.Printf("# %s;\n", blockName)
		return
	}

	// 计算启用的条目数
	enabledCount := 0
	for _, entry := range block.Entries {
		if entry.Enabled {
			enabledCount++
		}
	}

	// 详细信息显示
	fmt.Printf("名称: %s\n", blockName)

	// 根据块状态和条目状态确定显示状态
	if !block.Enabled {
		fmt.Printf("状态: 禁用\n")
	} else if len(block.Entries) == 0 {
		fmt.Printf("状态: 空块\n")
	} else if enabledCount == 0 {
		fmt.Printf("状态: 全部禁用 (0/%d)\n", len(block.Entries))
	} else if enabledCount == len(block.Entries) {
		fmt.Printf("状态: 全部启用 (%d/%d)\n", enabledCount, len(block.Entries))
	} else {
		fmt.Printf("状态: 部分启用 (%d/%d)\n", enabledCount, len(block.Entries))
	}

	if block.DNS != "" {
		fmt.Printf("DNS服务器: %s\n", block.DNS)
	}
	if block.DoH != "" {
		fmt.Printf("DoH服务器: %s\n", block.DoH)
	}
	if block.Server != "" {
		fmt.Printf("预设服务器: %s\n", block.Server)
	}
	if block.CronJob != "" {
		fmt.Printf("定时任务: %s\n", block.CronJob)
	}
	if !block.UpdateAt.IsZero() {
		fmt.Printf("最后更新: %s\n", block.UpdateAt.Format("2006-01-02 15:04:05"))
	}

	if len(block.Entries) == 0 {
		utils.LogInfo("\n没有域名记录")
		return
	}
	utils.LogInfo("\n域名记录 (%d 个条目):\n", len(block.Entries))

	// 域名记录表格
	headers := []string{"状态", "IP地址", "域名", "备注"}
	var rows [][]string

	for _, entry := range block.Entries {
		status := "启用"
		if !entry.Enabled {
			status = "禁用"
		}

		comment := entry.Comment
		if comment == "" {
			comment = "-"
		}

		rows = append(rows, []string{status, entry.IP, entry.Domain, comment})
	}

	// 设置合适的列宽
	columnWidths := []int{8, 16, 30, 20}
	utils.FormatTable(headers, rows, columnWidths)
}