package common

import (
	"encoding/json"
	"fmt"
	"io"
	"os"
	"slices"
	"strings"
)

type AutogitConfig struct {
	Workflows      []string
	Organization   string
	GitProjectName string
	Branch         string
}

func ReadWorkflowConfigs(reader io.Reader) ([]*AutogitConfig, error) {
	data, err := io.ReadAll(reader)
	if err != nil {
		return nil, fmt.Errorf("Error reading config file. err: %w", err)
	}

	var config []*AutogitConfig
	if err = json.Unmarshal(data, &config); err != nil {
		return nil, fmt.Errorf("Error parsing config file. err: %w", err)
	}

	availableWorkflows := []string{"pr", "push", "test"}
	for _, workflow := range config {
		for _, w := range workflow.Workflows {
			if !slices.Contains(availableWorkflows, w) {
				return nil, fmt.Errorf(
					"Invalid Workflow '%s'. Only available workflows are: %s",
					w, strings.Join(availableWorkflows, " "),
				)
			}
		}
		if len(workflow.GitProjectName) == 0 {
			workflow.GitProjectName = DefaultGitPrj
		}
	}

	return config, nil
}

func ReadWorkflowConfigsFile(filename string) ([]*AutogitConfig, error) {
	file, err := os.Open(filename)
	if err != nil {
		return nil, fmt.Errorf("Cannot open config file for reading. err: %w", err)
	}
	defer file.Close()

	return ReadWorkflowConfigs(file)
}