package user

import (
	"database/sql"
)

// PostgreSQL queries
const (
	// User queries
	postgresSelectUserByID = `
		SELECT u.id, u.user_name, u.pass, u.role, u.prefs, u.sync_topic, u.provisioned, u.stats_messages, u.stats_emails, u.stats_calls, u.stripe_customer_id, u.stripe_subscription_id, u.stripe_subscription_status, u.stripe_subscription_interval, u.stripe_subscription_paid_until, u.stripe_subscription_cancel_at, u.deleted, t.id, t.code, t.name, t.messages_limit, t.messages_expiry_duration, t.emails_limit, t.calls_limit, t.reservations_limit, t.attachment_file_size_limit, t.attachment_total_size_limit, t.attachment_expiry_duration, t.attachment_bandwidth_limit, t.stripe_monthly_price_id, t.stripe_yearly_price_id
		FROM "user" u
		LEFT JOIN tier t on t.id = u.tier_id
		WHERE u.id = $1
	`
	postgresSelectUserByName = `
		SELECT u.id, u.user_name, u.pass, u.role, u.prefs, u.sync_topic, u.provisioned, u.stats_messages, u.stats_emails, u.stats_calls, u.stripe_customer_id, u.stripe_subscription_id, u.stripe_subscription_status, u.stripe_subscription_interval, u.stripe_subscription_paid_until, u.stripe_subscription_cancel_at, u.deleted, t.id, t.code, t.name, t.messages_limit, t.messages_expiry_duration, t.emails_limit, t.calls_limit, t.reservations_limit, t.attachment_file_size_limit, t.attachment_total_size_limit, t.attachment_expiry_duration, t.attachment_bandwidth_limit, t.stripe_monthly_price_id, t.stripe_yearly_price_id
		FROM "user" u
		LEFT JOIN tier t on t.id = u.tier_id
		WHERE user_name = $1
	`
	postgresSelectUserByToken = `
		SELECT u.id, u.user_name, u.pass, u.role, u.prefs, u.sync_topic, u.provisioned, u.stats_messages, u.stats_emails, u.stats_calls, u.stripe_customer_id, u.stripe_subscription_id, u.stripe_subscription_status, u.stripe_subscription_interval, u.stripe_subscription_paid_until, u.stripe_subscription_cancel_at, u.deleted, t.id, t.code, t.name, t.messages_limit, t.messages_expiry_duration, t.emails_limit, t.calls_limit, t.reservations_limit, t.attachment_file_size_limit, t.attachment_total_size_limit, t.attachment_expiry_duration, t.attachment_bandwidth_limit, t.stripe_monthly_price_id, t.stripe_yearly_price_id
		FROM "user" u
		JOIN user_token tk on u.id = tk.user_id
		LEFT JOIN tier t on t.id = u.tier_id
		WHERE tk.token = $1 AND (tk.expires = 0 OR tk.expires >= $2)
	`
	postgresSelectUserByStripeID = `
		SELECT u.id, u.user_name, u.pass, u.role, u.prefs, u.sync_topic, u.provisioned, u.stats_messages, u.stats_emails, u.stats_calls, u.stripe_customer_id, u.stripe_subscription_id, u.stripe_subscription_status, u.stripe_subscription_interval, u.stripe_subscription_paid_until, u.stripe_subscription_cancel_at, u.deleted, t.id, t.code, t.name, t.messages_limit, t.messages_expiry_duration, t.emails_limit, t.calls_limit, t.reservations_limit, t.attachment_file_size_limit, t.attachment_total_size_limit, t.attachment_expiry_duration, t.attachment_bandwidth_limit, t.stripe_monthly_price_id, t.stripe_yearly_price_id
		FROM "user" u
		LEFT JOIN tier t on t.id = u.tier_id
		WHERE u.stripe_customer_id = $1
	`
	postgresSelectUsernames = `
		SELECT user_name
		FROM "user"
		ORDER BY
			CASE role
				WHEN 'admin' THEN 1
				WHEN 'anonymous' THEN 3
				ELSE 2
			END, user_name
	`
	postgresSelectUserCount          = `SELECT COUNT(*) FROM "user"`
	postgresSelectUserIDFromUsername = `SELECT id FROM "user" WHERE user_name = $1`
	postgresInsertUser               = `INSERT INTO "user" (id, user_name, pass, role, sync_topic, provisioned, created) VALUES ($1, $2, $3, $4, $5, $6, $7)`
	postgresUpdateUserPass           = `UPDATE "user" SET pass = $1 WHERE user_name = $2`
	postgresUpdateUserRole           = `UPDATE "user" SET role = $1 WHERE user_name = $2`
	postgresUpdateUserProvisioned    = `UPDATE "user" SET provisioned = $1 WHERE user_name = $2`
	postgresUpdateUserPrefs          = `UPDATE "user" SET prefs = $1 WHERE id = $2`
	postgresUpdateUserStats          = `UPDATE "user" SET stats_messages = $1, stats_emails = $2, stats_calls = $3 WHERE id = $4`
	postgresUpdateUserStatsResetAll  = `UPDATE "user" SET stats_messages = 0, stats_emails = 0, stats_calls = 0`
	postgresUpdateUserTier           = `UPDATE "user" SET tier_id = (SELECT id FROM tier WHERE code = $1) WHERE user_name = $2`
	postgresUpdateUserDeleted        = `UPDATE "user" SET deleted = $1 WHERE id = $2`
	postgresDeleteUser               = `DELETE FROM "user" WHERE user_name = $1`
	postgresDeleteUserTier           = `UPDATE "user" SET tier_id = null WHERE user_name = $1`
	postgresDeleteUsersMarked        = `DELETE FROM "user" WHERE deleted < $1`

	// Access queries
	postgresSelectTopicPerms = `
		SELECT read, write
		FROM user_access a
		JOIN "user" u ON u.id = a.user_id
		WHERE (u.user_name = $1 OR u.user_name = $2) AND $3 LIKE a.topic ESCAPE '\'
		ORDER BY u.user_name DESC, LENGTH(a.topic) DESC, CASE WHEN a.write THEN 1 ELSE 0 END DESC
	`
	postgresSelectUserAllAccess = `
		SELECT user_id, topic, read, write, provisioned
		FROM user_access
		ORDER BY LENGTH(topic) DESC, CASE WHEN write THEN 1 ELSE 0 END DESC, CASE WHEN read THEN 1 ELSE 0 END DESC, topic
	`
	postgresSelectUserAccess = `
		SELECT topic, read, write, provisioned
		FROM user_access
		WHERE user_id = (SELECT id FROM "user" WHERE user_name = $1)
		ORDER BY LENGTH(topic) DESC, CASE WHEN write THEN 1 ELSE 0 END DESC, CASE WHEN read THEN 1 ELSE 0 END DESC, topic
	`
	postgresSelectUserReservations = `
		SELECT a_user.topic, a_user.read, a_user.write, a_everyone.read AS everyone_read, a_everyone.write AS everyone_write
		FROM user_access a_user
		LEFT JOIN  user_access a_everyone ON a_user.topic = a_everyone.topic AND a_everyone.user_id = (SELECT id FROM "user" WHERE user_name = $1)
		WHERE a_user.user_id = a_user.owner_user_id
		  AND a_user.owner_user_id = (SELECT id FROM "user" WHERE user_name = $2)
		ORDER BY a_user.topic
	`
	postgresSelectUserReservationsCount = `
		SELECT COUNT(*)
		FROM user_access
		WHERE user_id = owner_user_id
		  AND owner_user_id = (SELECT id FROM "user" WHERE user_name = $1)
	`
	postgresSelectUserReservationsOwner = `
		SELECT owner_user_id
		FROM user_access
		WHERE topic = $1
		  AND user_id = owner_user_id
	`
	postgresSelectUserHasReservation = `
		SELECT COUNT(*)
		FROM user_access
		WHERE user_id = owner_user_id
		  AND owner_user_id = (SELECT id FROM "user" WHERE user_name = $1)
		  AND topic = $2
	`
	postgresSelectOtherAccessCount = `
		SELECT COUNT(*)
		FROM user_access
		WHERE (topic = $1 OR $2 LIKE topic ESCAPE '\')
		  AND (owner_user_id IS NULL OR owner_user_id != (SELECT id FROM "user" WHERE user_name = $3))
	`
	postgresUpsertUserAccess = `
		INSERT INTO user_access (user_id, topic, read, write, owner_user_id, provisioned)
		VALUES (
			(SELECT id FROM "user" WHERE user_name = $1),
			$2,
			$3,
			$4,
			CASE WHEN $5 = '' THEN NULL ELSE (SELECT id FROM "user" WHERE user_name = $6) END,
			$7
		)
		ON CONFLICT (user_id, topic)
		DO UPDATE SET read=EXCLUDED.read, write=EXCLUDED.write, owner_user_id=EXCLUDED.owner_user_id, provisioned=EXCLUDED.provisioned
	`
	postgresDeleteUserAccess = `
		DELETE FROM user_access
		WHERE user_id = (SELECT id FROM "user" WHERE user_name = $1)
		   OR owner_user_id = (SELECT id FROM "user" WHERE user_name = $2)
	`
	postgresDeleteUserAccessProvisioned = `DELETE FROM user_access WHERE provisioned = true`
	postgresDeleteTopicAccess           = `
		DELETE FROM user_access
	   	WHERE (user_id = (SELECT id FROM "user" WHERE user_name = $1) OR owner_user_id = (SELECT id FROM "user" WHERE user_name = $2))
	   	  AND topic = $3
  	`
	postgresDeleteAllAccess = `DELETE FROM user_access`

	// Token queries
	postgresSelectToken                = `SELECT token, label, last_access, last_origin, expires, provisioned FROM user_token WHERE user_id = $1 AND token = $2`
	postgresSelectTokens               = `SELECT token, label, last_access, last_origin, expires, provisioned FROM user_token WHERE user_id = $1`
	postgresSelectTokenCount           = `SELECT COUNT(*) FROM user_token WHERE user_id = $1`
	postgresSelectAllProvisionedTokens = `SELECT token, label, last_access, last_origin, expires, provisioned FROM user_token WHERE provisioned = true`
	postgresUpsertToken                = `
		INSERT INTO user_token (user_id, token, label, last_access, last_origin, expires, provisioned)
		VALUES ($1, $2, $3, $4, $5, $6, $7)
		ON CONFLICT (user_id, token)
		DO UPDATE SET label = EXCLUDED.label, expires = EXCLUDED.expires, provisioned = EXCLUDED.provisioned
	`
	postgresUpdateTokenLabel       = `UPDATE user_token SET label = $1 WHERE user_id = $2 AND token = $3`
	postgresUpdateTokenExpiry      = `UPDATE user_token SET expires = $1 WHERE user_id = $2 AND token = $3`
	postgresUpdateTokenLastAccess  = `UPDATE user_token SET last_access = $1, last_origin = $2 WHERE token = $3`
	postgresDeleteToken            = `DELETE FROM user_token WHERE user_id = $1 AND token = $2`
	postgresDeleteProvisionedToken = `DELETE FROM user_token WHERE token = $1`
	postgresDeleteAllToken         = `DELETE FROM user_token WHERE user_id = $1`
	postgresDeleteExpiredTokens    = `DELETE FROM user_token WHERE expires > 0 AND expires < $1`
	postgresDeleteExcessTokens     = `
		DELETE FROM user_token
		WHERE user_id = $1
		  AND (user_id, token) NOT IN (
			SELECT user_id, token
			FROM user_token
			WHERE user_id = $2
			ORDER BY expires DESC
			LIMIT $3
		)
	`

	// Tier queries
	postgresInsertTier = `
		INSERT INTO tier (id, code, name, messages_limit, messages_expiry_duration, emails_limit, calls_limit, reservations_limit, attachment_file_size_limit, attachment_total_size_limit, attachment_expiry_duration, attachment_bandwidth_limit, stripe_monthly_price_id, stripe_yearly_price_id)
		VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14)
	`
	postgresUpdateTier = `
		UPDATE tier
		SET name = $1, messages_limit = $2, messages_expiry_duration = $3, emails_limit = $4, calls_limit = $5, reservations_limit = $6, attachment_file_size_limit = $7, attachment_total_size_limit = $8, attachment_expiry_duration = $9, attachment_bandwidth_limit = $10, stripe_monthly_price_id = $11, stripe_yearly_price_id = $12
		WHERE code = $13
	`
	postgresSelectTiers = `
		SELECT id, code, name, messages_limit, messages_expiry_duration, emails_limit, calls_limit, reservations_limit, attachment_file_size_limit, attachment_total_size_limit, attachment_expiry_duration, attachment_bandwidth_limit, stripe_monthly_price_id, stripe_yearly_price_id
		FROM tier
	`
	postgresSelectTierByCode = `
		SELECT id, code, name, messages_limit, messages_expiry_duration, emails_limit, calls_limit, reservations_limit, attachment_file_size_limit, attachment_total_size_limit, attachment_expiry_duration, attachment_bandwidth_limit, stripe_monthly_price_id, stripe_yearly_price_id
		FROM tier
		WHERE code = $1
	`
	postgresSelectTierByPriceID = `
		SELECT id, code, name, messages_limit, messages_expiry_duration, emails_limit, calls_limit, reservations_limit, attachment_file_size_limit, attachment_total_size_limit, attachment_expiry_duration, attachment_bandwidth_limit, stripe_monthly_price_id, stripe_yearly_price_id
		FROM tier
		WHERE (stripe_monthly_price_id = $1 OR stripe_yearly_price_id = $2)
	`
	postgresDeleteTier = `DELETE FROM tier WHERE code = $1`

	// Phone queries
	postgresSelectPhoneNumbers = `SELECT phone_number FROM user_phone WHERE user_id = $1`
	postgresInsertPhoneNumber  = `INSERT INTO user_phone (user_id, phone_number) VALUES ($1, $2)`
	postgresDeletePhoneNumber  = `DELETE FROM user_phone WHERE user_id = $1 AND phone_number = $2`

	// Billing queries
	postgresUpdateBilling = `
		UPDATE "user"
		SET stripe_customer_id = $1, stripe_subscription_id = $2, stripe_subscription_status = $3, stripe_subscription_interval = $4, stripe_subscription_paid_until = $5, stripe_subscription_cancel_at = $6
		WHERE user_name = $7
	`
)

// NewPostgresStore creates a new PostgreSQL-backed user store using an existing database connection pool.
func NewPostgresStore(db *sql.DB) (Store, error) {
	if err := setupPostgres(db); err != nil {
		return nil, err
	}
	return &commonStore{
		db: db,
		queries: storeQueries{
			// User queries
			selectUserByID:           postgresSelectUserByID,
			selectUserByName:         postgresSelectUserByName,
			selectUserByToken:        postgresSelectUserByToken,
			selectUserByStripeID:     postgresSelectUserByStripeID,
			selectUsernames:          postgresSelectUsernames,
			selectUserCount:          postgresSelectUserCount,
			selectUserIDFromUsername: postgresSelectUserIDFromUsername,
			insertUser:               postgresInsertUser,
			updateUserPass:           postgresUpdateUserPass,
			updateUserRole:           postgresUpdateUserRole,
			updateUserProvisioned:    postgresUpdateUserProvisioned,
			updateUserPrefs:          postgresUpdateUserPrefs,
			updateUserStats:          postgresUpdateUserStats,
			updateUserStatsResetAll:  postgresUpdateUserStatsResetAll,
			updateUserTier:           postgresUpdateUserTier,
			updateUserDeleted:        postgresUpdateUserDeleted,
			deleteUser:               postgresDeleteUser,
			deleteUserTier:           postgresDeleteUserTier,
			deleteUsersMarked:        postgresDeleteUsersMarked,

			// Access queries
			selectTopicPerms:            postgresSelectTopicPerms,
			selectUserAllAccess:         postgresSelectUserAllAccess,
			selectUserAccess:            postgresSelectUserAccess,
			selectUserReservations:      postgresSelectUserReservations,
			selectUserReservationsCount: postgresSelectUserReservationsCount,
			selectUserReservationsOwner: postgresSelectUserReservationsOwner,
			selectUserHasReservation:    postgresSelectUserHasReservation,
			selectOtherAccessCount:      postgresSelectOtherAccessCount,
			upsertUserAccess:            postgresUpsertUserAccess,
			deleteUserAccess:            postgresDeleteUserAccess,
			deleteUserAccessProvisioned: postgresDeleteUserAccessProvisioned,
			deleteTopicAccess:           postgresDeleteTopicAccess,
			deleteAllAccess:             postgresDeleteAllAccess,

			// Token queries
			selectToken:                postgresSelectToken,
			selectTokens:               postgresSelectTokens,
			selectTokenCount:           postgresSelectTokenCount,
			selectAllProvisionedTokens: postgresSelectAllProvisionedTokens,
			upsertToken:                postgresUpsertToken,
			updateTokenLabel:           postgresUpdateTokenLabel,
			updateTokenExpiry:          postgresUpdateTokenExpiry,
			updateTokenLastAccess:      postgresUpdateTokenLastAccess,
			deleteToken:                postgresDeleteToken,
			deleteProvisionedToken:     postgresDeleteProvisionedToken,
			deleteAllToken:             postgresDeleteAllToken,
			deleteExpiredTokens:        postgresDeleteExpiredTokens,
			deleteExcessTokens:         postgresDeleteExcessTokens,

			// Tier queries
			insertTier:          postgresInsertTier,
			selectTiers:         postgresSelectTiers,
			selectTierByCode:    postgresSelectTierByCode,
			selectTierByPriceID: postgresSelectTierByPriceID,
			updateTier:          postgresUpdateTier,
			deleteTier:          postgresDeleteTier,

			// Phone queries
			selectPhoneNumbers: postgresSelectPhoneNumbers,
			insertPhoneNumber:  postgresInsertPhoneNumber,
			deletePhoneNumber:  postgresDeletePhoneNumber,

			// Billing queries
			updateBilling: postgresUpdateBilling,
		},
	}, nil
}