const bcrypt = require("bcryptjs")
const database = require("../modules/database")
const utils = require("../modules/utils")
const { DefaultError } = require("../errors/errors")

async function getUser(identifier, requirePassword = false) {
    try {
        const sql = `SELECT * FROM players WHERE uuid = ? OR email = ? OR username = ?`
        const rows = await database.query(sql, [identifier, identifier, identifier])
        const user = rows[0]
        if (!user) {
            throw new DefaultError(404, "User not found")
        }

        delete user.email
        if (!requirePassword) {
            delete user.password
        }
        return { code: 200, user }

    } catch (error) {
        return utils.handleDBError(error)
    }
}

async function register(email, username, password) {
    try {
        const sql = `INSERT INTO players (email, username, password, uuid) VALUES (?, ?, ?, ?)`
        const uuid = crypto.randomUUID()
        const hashedPassword = await bcrypt.hash(password, 10)
        const result = await database.query(sql, [email, username, hashedPassword, uuid])
        if (result.affectedRows > 0) {
            return { code: 200, email, username, uuid }
        } else {
            throw new DefaultError(500, "Please contact an administrator.", "InternalServerError")
        }
    } catch (error) {
        return utils.handleDBError(error)
    }
}

async function insertClientSession(accessToken, clientToken, uuid) {
    try {
        const sql = `INSERT INTO clientSessions (accessToken, clientToken, uuid) VALUES (?, ?, ?)`
        const result = await database.query(sql, [accessToken, clientToken, uuid])
        
        if (result.affectedRows > 0) {
            return { code: 204, accessToken, clientToken }
        } else {
            throw new DefaultError(500, "Please contact an administrator.", "InternalServerError")
        }
    } catch (error) {
        return utils.handleDBError(error)
    }
}

async function getPlayerProperties(uuid) {
    try {
        const sql = `SELECT * FROM playersProperties WHERE uuid = ?`
        const properties = await database.query(sql, [uuid])
        
        if (properties.length === 0) {
            throw new DefaultError(404, "Properties not found for this user.", "InternalServerError")
        }
        return { code: 200, properties: properties.map(property => { return { name: property.name, value: property.value } }) }
    } catch (error) {
        return utils.handleDBError(error)
    }
}

async function getClientSession(accessToken, clientToken) {
    try {
        const sql = `SELECT * FROM clientSessions WHERE accessToken = ? AND clientToken = ?`
        const rows = await database.query(sql, [accessToken, clientToken])
        
        const session = rows[0]
        if (session) { 
            return { 
                code: 200, 
                session: session
            } 
        } else {
            throw new DefaultError(404, "Client session not found")
        }
    } catch (error) {
        return utils.handleDBError(error)
    }
}

async function validateClientSession(accessToken, clientToken) {
    try {
        const sql = `SELECT * FROM clientSessions WHERE accessToken = ? AND clientToken = ?`
        const rows = await database.query(sql, [accessToken, clientToken])
        
        const session = rows[0]
        if (session) { 
            return { 
                code: 200, 
                message: "Client session valid."
            } 
        }  else {
            throw new DefaultError(404, "Client session not found for this accessToken/clientToken combination.")
        }
    } catch (error) {
        return utils.handleDBError(error)
    }
}

async function validateClientSessionWithoutClientToken(accessToken) {
    try {
        const sql = `SELECT * FROM clientSessions WHERE accessToken = ?`
        const rows = await database.query(sql, [accessToken])
        
        const session = rows[0]
        if (session) { 
            return { 
                code: 200, 
                message: "Client session valid."
            } 
        }  else {
            throw new DefaultError(404, "Client session not found for this accessToken.")
        }
    } catch (error) {
        return utils.handleDBError(error)
    }
}

async function invalidateClientSession(accessToken, clientToken) {
    try {
        const sql = `DELETE FROM clientSessions WHERE accessToken = ? AND clientToken = ?`
        const result = await database.query(sql, [accessToken, clientToken])
        
        if (result.affectedRows > 0) {
            return { 
                code: 200, 
                message: "Client session successfully invalidated." 
            }
        } else {
            throw new DefaultError(404, "Client session not found for this accessToken/clientToken combination.")
        }
    } catch (error) {
        return utils.handleDBError(error)
    }
}

async function revokeAccessTokens(uuid) {
    try {
        const sql = `DELETE FROM clientSessions WHERE uuid = ?`
        const result = await database.query(sql, [uuid])

        if (result.affectedRows > 0) {
            return { 
                code: 200, 
                message: "Access tokens successfully revoked." 
            }
        } else {
            throw new DefaultError(404, "No access token found for this user.")
        }
    } catch (error) {
        return utils.handleDBError(error)
    }
}

async function getUsernamesRules() {
    try {
        const rows = await database.query("SELECT rule, type FROM usernameRules")
        return rows.map(row => {
            if (row.type === 1) {
                return { type: "regex", pattern: new RegExp(row.rule, "i") }
            } else {
                return { type: "literal", value: row.rule.toLowerCase() }
            }
        })
    } catch (err) {
        throw err
    }
}

module.exports = {
    getUser,
    register,
    getClientSession,
    getUsernamesRules,
    revokeAccessTokens,
    insertClientSession,
    getPlayerProperties,
    validateClientSession,
    invalidateClientSession,
    validateClientSessionWithoutClientToken
}