package config

import (
	"fmt"
	"os"
	"time"

	"gopkg.in/yaml.v3"
)

type Config struct {
	Environment  string       `yaml:"environment"`
	ArchiveDir   string       `yaml:"archiveDir"`
	StateDir     string       `yaml:"stateDir"`
	PollInterval string       `yaml:"pollInterval"`
	Feishu       FeishuConfig `yaml:"feishu"`

	PollDuration time.Duration `yaml:"-"`
}

type FeishuConfig struct {
	AppID     string `yaml:"appId"`
	AppSecret string `yaml:"appSecret"`
	ChatID    string `yaml:"chatId"`
}

func Load(path string) (Config, error) {
	body, err := os.ReadFile(path)
	if err != nil {
		return Config{}, fmt.Errorf("read config %s: %w", path, err)
	}
	var cfg Config
	if err := yaml.Unmarshal(body, &cfg); err != nil {
		return Config{}, fmt.Errorf("parse config %s: %w", path, err)
	}
	if cfg.Environment == "" {
		cfg.Environment = "preview"
	}
	if cfg.ArchiveDir == "" {
		cfg.ArchiveDir = "/data/full-sync"
	}
	if cfg.StateDir == "" {
		cfg.StateDir = "/data/state"
	}
	if cfg.PollInterval == "" {
		cfg.PollInterval = "10s"
	}
	cfg.PollDuration, err = time.ParseDuration(cfg.PollInterval)
	if err != nil || cfg.PollDuration <= 0 {
		return Config{}, fmt.Errorf("invalid pollInterval %q", cfg.PollInterval)
	}
	return cfg, nil
}

func (c Config) ValidateSend() error {
	if c.Feishu.AppID == "" || c.Feishu.AppSecret == "" {
		return fmt.Errorf("feishu.appId and feishu.appSecret are required")
	}
	if c.Feishu.ChatID == "" {
		return fmt.Errorf("feishu.chatId is required")
	}
	return nil
}