package db

import (
	"go-eve-pi/esi"
	"go-eve-pi/options"
	"go-eve-pi/types"
	"path/filepath"

	"gorm.io/driver/sqlite"
	"gorm.io/gorm"

	logger "git.site.quack-lab.dev/dave/cylogger"
)

type DB interface {
	DB() *gorm.DB
	Raw(sql string, args ...any) *gorm.DB
	GetCharacterByName(characterName string) (*types.Character, error)
	SaveCharacter(character *types.Character) error
	AutoMigrate(dst ...interface{}) error
	GetCacheEntry(urlHash string) (*esi.CacheEntry, error)
	SaveCacheEntry(entry *esi.CacheEntry) error
}

type DBWrapper struct {
	db *gorm.DB
}

var db *DBWrapper

func GetDB() (DB, error) {
	var err error

	if db != nil {
		logger.Debug("Returning existing database connection")
		return db, nil
	}

	logger.Debug("Creating new database connection to %s", options.GlobalOptions.DBPath)
	dbFile := filepath.Join(options.GlobalOptions.DBPath)
	db, err := gorm.Open(sqlite.Open(dbFile), &gorm.Config{
		// SkipDefaultTransaction: true,
		PrepareStmt: true,
		// Logger:      gormlogger.Default.LogMode(gormlogger.Silent),
	})
	if err != nil {
		logger.Error("Failed to open database: %v", err)
		return nil, err
	}

	logger.Info("Database connection established successfully")
	return &DBWrapper{db: db}, nil
}

func (db *DBWrapper) Raw(sql string, args ...any) *gorm.DB {
	return db.db.Raw(sql, args...)
}

func (db *DBWrapper) DB() *gorm.DB {
	return db.db
}

func (db *DBWrapper) GetCharacterByName(characterName string) (*types.Character, error) {
	logger.Debug("Fetching token for character %s from database", characterName)
	var char types.Character
	err := db.db.Where("character_name = ?", characterName).First(&char).Error
	if err != nil {
		logger.Debug("No token found for character %s: %v", characterName, err)
		return nil, err
	}
	logger.Debug("Token found for character %s, expires at %v", characterName, char.ExpiresAt)
	return &char, nil
}

func (db *DBWrapper) SaveCharacter(character *types.Character) error {
	logger.Debug("Saving token for character %s to database", character.CharacterName)
	err := db.db.Save(character).Error
	if err != nil {
		return err
	}
	logger.Debug("Token saved successfully for character %s", character.CharacterName)
	return nil
}

func (db *DBWrapper) AutoMigrate(dst ...interface{}) error {
	logger.Debug("Running database auto-migration")
	err := db.db.AutoMigrate(dst...)
	if err != nil {
		return err
	}
	logger.Debug("Database auto-migration completed successfully")
	return nil
}

func (db *DBWrapper) GetCacheEntry(urlHash string) (*esi.CacheEntry, error) {
	logger.Debug("Fetching cache entry for URL hash: %s", urlHash)
	var entry esi.CacheEntry
	err := db.db.Where("url_hash = ?", urlHash).First(&entry).Error
	if err != nil {
		logger.Debug("No cache entry found for URL hash: %s", urlHash)
		return nil, err
	}
	logger.Debug("Cache entry found for URL hash: %s, cached at: %v", urlHash, entry.CachedAt)
	return &entry, nil
}

func (db *DBWrapper) SaveCacheEntry(entry *esi.CacheEntry) error {
	logger.Debug("Saving cache entry for URL hash: %s", entry.URLHash)
	err := db.db.Save(entry).Error
	if err != nil {
		return err
	}
	logger.Debug("Cache entry saved successfully for URL hash: %s", entry.URLHash)
	return nil
}