package adapter

import (
	"fmt"
	"os"
	"path/filepath"
	"strings"

	"skillmgr/internal/types"
)

// OpenCodeAdapter OpenCode 平台适配器
type OpenCodeAdapter struct{}

// GetSkillInstallPath 获取 skill 安装路径
func (a *OpenCodeAdapter) GetSkillInstallPath(scope types.Scope, skillName string) (string, error) {
	base, err := getBasePath(scope)
	if err != nil {
		return "", err
	}
	if scope == types.ScopeGlobal {
		// 全局: ~/.config/opencode/skills/<name>/
		return filepath.Join(base, ".config", "opencode", "skills", skillName), nil
	}
	// 项目级: ./.opencode/skills/<name>/
	return filepath.Join(base, ".opencode", "skills", skillName), nil
}

// GetCommandInstallPath 获取 command 安装路径
func (a *OpenCodeAdapter) GetCommandInstallPath(scope types.Scope, commandGroup string) (string, error) {
	base, err := getBasePath(scope)
	if err != nil {
		return "", err
	}
	if scope == types.ScopeGlobal {
		// 全局: ~/.config/opencode/commands/（扁平化，所有命令在同一目录）
		return filepath.Join(base, ".config", "opencode", "commands"), nil
	}
	// 项目级: ./.opencode/commands/
	return filepath.Join(base, ".opencode", "commands"), nil
}

// AdaptSkill 适配 skill（与 Claude 相同，保持目录结构）
func (a *OpenCodeAdapter) AdaptSkill(sourcePath, destBasePath string) (map[string]string, error) {
	mapping := make(map[string]string)

	err := filepath.Walk(sourcePath, func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}

		relPath, err := filepath.Rel(sourcePath, path)
		if err != nil {
			return fmt.Errorf("计算相对路径失败: %w", err)
		}
		destPath := filepath.Join(destBasePath, relPath)

		if !info.IsDir() {
			mapping[path] = destPath
		}

		return nil
	})

	return mapping, err
}

// AdaptCommand 适配 command（扁平化文件名：<group>-<action>.md）
func (a *OpenCodeAdapter) AdaptCommand(sourcePath, destBasePath, commandGroup string) (map[string]string, error) {
	mapping := make(map[string]string)

	files, err := filepath.Glob(filepath.Join(sourcePath, "*.md"))
	if err != nil {
		return nil, err
	}

	for _, file := range files {
		fileName := filepath.Base(file)
		baseName := strings.TrimSuffix(fileName, ".md")

		// 重命名：init.md → lyxy-kb-init.md
		newName := commandGroup + "-" + baseName + ".md"
		destPath := filepath.Join(destBasePath, newName)

		mapping[file] = destPath
	}

	return mapping, nil
}