package models

import (
	"database/sql"
	"encoding/json"
	"fmt"
	"time"
)

// Bot represents a Nostr posting bot
type Bot struct {
	ID              int64          `db:"id" json:"id"`
	Pubkey          string         `db:"pubkey" json:"pubkey"`
	EncryptedPrivkey string        `db:"encrypted_privkey" json:"encrypted_privkey,omitempty"`
	Name            string         `db:"name" json:"name"`
	DisplayName     string         `db:"display_name" json:"display_name"`
	Bio             string         `db:"bio" json:"bio"`
	Nip05           string         `db:"nip05" json:"nip05"`
	ZapAddress      string         `db:"zap_address" json:"zap_address"`
	ProfilePicture  string         `db:"profile_picture" json:"profile_picture"`
	Banner          string         `db:"banner" json:"banner"`
	Website         sql.NullString `db:"website" json:"website,omitempty"` // Changed to sql.NullString to handle NULL values
	// Custom JSON marshaling is handled in MarshalJSON/UnmarshalJSON methods
	CreatedAt       time.Time      `db:"created_at" json:"created_at"`
	OwnerPubkey     string         `db:"owner_pubkey" json:"owner_pubkey"`
	
	// The following are not stored in the database
	PostConfig     *PostConfig     `json:"post_config,omitempty"`
	MediaConfig    *MediaConfig    `json:"media_config,omitempty"`
	Relays         []*Relay        `json:"relays,omitempty"`
}

// PostConfig represents the posting configuration for a bot
type PostConfig struct {
	ID              int64     `db:"id" json:"id"`
	BotID           int64     `db:"bot_id" json:"-"`
	Hashtags        string    `db:"hashtags" json:"hashtags"` // JSON array stored as string
	IntervalMinutes int       `db:"interval_minutes" json:"interval_minutes"`
	PostTemplate    string    `db:"post_template" json:"post_template"`
	Enabled         bool      `db:"enabled" json:"enabled"`
}

// MediaConfig represents the media upload configuration for a bot
type MediaConfig struct {
	ID              int64  `db:"id" json:"id"`
	BotID           int64  `db:"bot_id" json:"-"`
	PrimaryService  string `db:"primary_service" json:"primary_service"` // "nip94" or "blossom"
	FallbackService string `db:"fallback_service" json:"fallback_service"`
	Nip94ServerURL  string `db:"nip94_server_url" json:"nip94_server_url"`
	BlossomServerURL string `db:"blossom_server_url" json:"blossom_server_url"`
}

// Relay represents a Nostr relay configuration
type Relay struct {
    ID          int64  `db:"id" json:"id"`
    BotID       int64  `db:"bot_id" json:"-"`
    URL         string `db:"url" json:"url"`
    Read        bool   `db:"read" json:"read"`
    Write       bool   `db:"write" json:"write"`
    OwnerPubkey string `db:"owner_pubkey" json:"owner_pubkey,omitempty"` // Add this field
}

// Post represents a post made by the bot
type Post struct {
	ID              int64     `db:"id" json:"id"`
	BotID           int64     `db:"bot_id" json:"bot_id"`
	ContentFilename string    `db:"content_filename" json:"content_filename"`
	MediaURL        string    `db:"media_url" json:"media_url"`
	EventID         string    `db:"event_id" json:"event_id"`
	Status          string    `db:"status" json:"status"` // "pending", "posted", "failed"
	CreatedAt       time.Time `db:"created_at" json:"created_at"`
	Error           string    `db:"error" json:"error,omitempty"`
}

// MarshalJSON handles custom JSON marshaling for Bot, especially for sql.NullString fields
func (b Bot) MarshalJSON() ([]byte, error) {
	type Alias Bot // Create an alias to avoid infinite recursion
	
	// Create a copy of the bot to modify for JSON
	bot := &struct {
		Website interface{} `json:"website,omitempty"`
		*Alias
	}{
		Alias: (*Alias)(&b),
	}
	
	// Handle the sql.NullString field specifically
	if b.Website.Valid {
		bot.Website = b.Website.String
	} else {
		bot.Website = nil
	}
	
	return json.Marshal(bot)
}

// UnmarshalJSON handles custom JSON unmarshaling for Bot, especially for sql.NullString fields
func (b *Bot) UnmarshalJSON(data []byte) error {
	type Alias Bot // Create an alias to avoid infinite recursion
	
	// Create a proxy structure with website as interface{}
	aux := &struct {
		Website interface{} `json:"website,omitempty"`
		*Alias
	}{
		Alias: (*Alias)(b),
	}
	
	if err := json.Unmarshal(data, &aux); err != nil {
		return err
	}
	
	// Handle possible types for the website field
	if aux.Website == nil {
		b.Website = sql.NullString{Valid: false}
	} else {
		switch v := aux.Website.(type) {
		case string:
			b.Website = sql.NullString{String: v, Valid: true}
		case map[string]interface{}:
			// Handle specific JSON format for sql.NullString
			if str, ok := v["String"].(string); ok {
				valid := true
				if v, ok := v["Valid"].(bool); ok {
					valid = v
				}
				b.Website = sql.NullString{String: str, Valid: valid}
			}
		case nil:
			b.Website = sql.NullString{Valid: false}
		default:
			return fmt.Errorf("unsupported type for Website: %T", v)
		}
	}
	
	return nil
}