package actions

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

	"github.com/google/go-github/v69/github"
	"github.com/mudler/LocalAGI/core/types"
	"github.com/mudler/LocalAGI/pkg/config"
	"github.com/mudler/LocalAGI/pkg/xlog"
	"github.com/sashabaranov/go-openai/jsonschema"
)

type GithubRepositoryGetAllContent struct {
	token, repository, owner, customActionName string
	client                                     *github.Client
}

func NewGithubRepositoryGetAllContent(config map[string]string) *GithubRepositoryGetAllContent {
	client := github.NewClient(nil).WithAuthToken(config["token"])

	return &GithubRepositoryGetAllContent{
		client:           client,
		token:            config["token"],
		repository:       config["repository"],
		owner:            config["owner"],
		customActionName: config["customActionName"],
	}
}

// isTextFile checks if a file is likely to be a text file based on its extension
func isTextFile(path string) bool {
	// List of common text/code file extensions
	textExtensions := map[string]bool{
		".txt": true, ".md": true, ".go": true, ".py": true, ".js": true,
		".ts": true, ".jsx": true, ".tsx": true, ".html": true, ".css": true,
		".json": true, ".yaml": true, ".yml": true, ".xml": true, ".sql": true,
		".sh": true, ".bash": true, ".zsh": true, ".rb": true, ".php": true,
		".java": true, ".c": true, ".cpp": true, ".h": true, ".hpp": true,
		".rs": true, ".swift": true, ".kt": true, ".scala": true, ".lua": true,
		".pl": true, ".r": true, ".m": true, ".mm": true, ".f": true,
		".f90": true, ".f95": true, ".f03": true, ".f08": true, ".f15": true,
		".hs": true, ".lhs": true, ".erl": true, ".hrl": true, ".ex": true,
		".exs": true, ".eex": true, ".leex": true, ".heex": true, ".config": true,
		".toml": true, ".ini": true, ".conf": true, ".env": true, ".gitignore": true,
		".dockerignore": true, ".editorconfig": true, ".prettierrc": true, ".eslintrc": true,
		".babelrc": true, ".npmrc": true, ".yarnrc": true, ".lock": true,
	}

	// Get the file extension
	ext := strings.ToLower(filepath.Ext(path))
	return textExtensions[ext]
}

func (g *GithubRepositoryGetAllContent) getContentRecursively(ctx context.Context, path string, owner string, repository string) (string, error) {
	var result strings.Builder

	// Get content at the current path
	_, directoryContent, _, err := g.client.Repositories.GetContents(ctx, owner, repository, path, nil)
	if err != nil {
		return "", fmt.Errorf("error getting content at path %s: %w", path, err)
	}

	// Process each item in the directory
	for _, item := range directoryContent {
		if item.GetType() == "dir" {
			// Recursively get content for subdirectories
			subContent, err := g.getContentRecursively(ctx, item.GetPath(), owner, repository)
			if err != nil {
				return "", err
			}
			result.WriteString(subContent)
		} else if item.GetType() == "file" {
			// Skip binary/image files
			if !isTextFile(item.GetPath()) {
				xlog.Warn("Skipping non-text file: ", "file", item.GetPath())
				result.WriteString(fmt.Sprintf("Skipping non-text file: %s\n", item.GetPath()))
				continue
			}

			// Get file content
			fileContent, _, _, err := g.client.Repositories.GetContents(ctx, owner, repository, item.GetPath(), nil)
			if err != nil {
				return "", fmt.Errorf("error getting file content for %s: %w", item.GetPath(), err)
			}

			content, err := fileContent.GetContent()
			if err != nil {
				return "", fmt.Errorf("error decoding content for %s: %w", item.GetPath(), err)
			}

			// Add file content to result with clear markers
			result.WriteString(fmt.Sprintf("\n--- START FILE: %s ---\n", item.GetPath()))
			result.WriteString(content)
			result.WriteString(fmt.Sprintf("\n--- END FILE: %s ---\n", item.GetPath()))
		}
	}

	return result.String(), nil
}

func (g *GithubRepositoryGetAllContent) Run(ctx context.Context, params types.ActionParams) (types.ActionResult, error) {
	result := struct {
		Repository string `json:"repository"`
		Owner      string `json:"owner"`
		Path       string `json:"path,omitempty"`
	}{}
	err := params.Unmarshal(&result)
	if err != nil {
		return types.ActionResult{}, fmt.Errorf("failed to unmarshal params: %w", err)
	}

	if g.repository != "" && g.owner != "" {
		result.Repository = g.repository
		result.Owner = g.owner
	}

	// Start from root if no path specified
	if result.Path == "" {
		result.Path = "."
	}

	content, err := g.getContentRecursively(ctx, result.Path, result.Owner, result.Repository)
	if err != nil {
		return types.ActionResult{}, err
	}

	return types.ActionResult{Result: content}, nil
}

func (g *GithubRepositoryGetAllContent) Definition() types.ActionDefinition {
	actionName := "get_all_github_repository_content"
	if g.customActionName != "" {
		actionName = g.customActionName
	}
	description := "Get all content of a GitHub repository recursively"
	if g.repository != "" && g.owner != "" {
		return types.ActionDefinition{
			Name:        types.ActionDefinitionName(actionName),
			Description: description,
			Properties: map[string]jsonschema.Definition{
				"path": {
					Type:        jsonschema.String,
					Description: "Optional path to start from (defaults to repository root)",
				},
			},
		}
	}
	return types.ActionDefinition{
		Name:        types.ActionDefinitionName(actionName),
		Description: description,
		Properties: map[string]jsonschema.Definition{
			"path": {
				Type:        jsonschema.String,
				Description: "Optional path to start from (defaults to repository root)",
			},
			"repository": {
				Type:        jsonschema.String,
				Description: "The repository to get content from",
			},
			"owner": {
				Type:        jsonschema.String,
				Description: "The owner of the repository",
			},
		},
		Required: []string{"repository", "owner"},
	}
}

func (a *GithubRepositoryGetAllContent) Plannable() bool {
	return true
}

// GithubRepositoryGetAllContentConfigMeta returns the metadata for GitHub Repository Get All Content action configuration fields
func GithubRepositoryGetAllContentConfigMeta() []config.Field {
	return []config.Field{
		{
			Name:     "token",
			Label:    "GitHub Token",
			Type:     config.FieldTypeText,
			Required: true,
			HelpText: "GitHub API token with repository access",
		},
		{
			Name:     "repository",
			Label:    "Repository",
			Type:     config.FieldTypeText,
			Required: false,
			HelpText: "GitHub repository name",
		},
		{
			Name:     "owner",
			Label:    "Owner",
			Type:     config.FieldTypeText,
			Required: false,
			HelpText: "GitHub repository owner",
		},
		{
			Name:     "customActionName",
			Label:    "Custom Action Name",
			Type:     config.FieldTypeText,
			HelpText: "Custom name for this action",
		},
	}
}