package database

import (
	"database/sql"
	"log"
	"time"

	"git.xeserv.us/xena/mercy/internal/common"
	"github.com/Xe/gorqlite"
)

type Results struct {
	conn gorqlite.Connection

	insResult             gorqlite.PreparedStatement
	getResultsForCustomer gorqlite.PreparedStatement
}

func NewResults(conn gorqlite.Connection) *Results {
	return &Results{
		conn: conn,

		insResult:             gorqlite.NewPreparedStatement("INSERT INTO results (timestamp, customer_id, check_id, run_id, result, error_msg) VALUES (%d, %s, %s, %s, %d, %s)"),
		getResultsForCustomer: gorqlite.NewPreparedStatement("SELECT * FROM results WHERE customer_id=%s"),
	}
}

func (r *Results) Migrate() error {
	ddl := []string{
		`CREATE TABLE IF NOT EXISTS results (id INTEGER PRIMARY KEY, timestamp INTEGER, customer_id TEXT NOT NULL, check_id TEXT NOT NULL, run_id TEXT NOT NULL, result INTEGER NOT NULL, error_msg TEXT)`,
	}

	_, err := r.conn.Write(ddl)
	return err
}

func (r *Results) InsResult(cr common.CheckResult) error {
	_, err := r.conn.WriteOne(r.insResult.Bind(cr.Timestamp.Unix(), cr.Preamble.CustomerID, cr.Preamble.CheckID, cr.Preamble.RunID, cr.Result, cr.ErrData))
	return err
}

func (r *Results) GetResultsForCustomer(cid string) ([]common.CheckResult, error) {
	var result []common.CheckResult
	res, err := r.conn.QueryOne(r.getResultsForCustomer.Bind(cid))
	if err != nil {
		return nil, err
	}

	if res.NumRows() == 0 {
		return nil, sql.ErrNoRows
	}

	for res.Next() {
		var cr common.CheckResult
		var ts int64
		var checkResult int64
		err = res.Scan(&cr.Preamble.CheckID, &ts, &cr.Preamble.CustomerID, &cr.Preamble.CheckID, &cr.Preamble.RunID, &checkResult, &cr.ErrData)
		if err != nil {
			return nil, err
		}

		cr.Timestamp = time.Unix(ts, 0)
		cr.Result = common.Result(checkResult)

		result = append(result, cr)
	}

	return result, nil
}

type Checks struct {
	conn gorqlite.Connection

	insCheck             gorqlite.PreparedStatement
	getCheck             gorqlite.PreparedStatement
	getAllChecks         gorqlite.PreparedStatement
	getChecksForCustomer gorqlite.PreparedStatement
	activeCheck          gorqlite.PreparedStatement
	deactiveCheck        gorqlite.PreparedStatement
	removeCheck          gorqlite.PreparedStatement
	updateLastRes        gorqlite.PreparedStatement
}

func NewChecks(conn gorqlite.Connection) *Checks {
	return &Checks{
		conn:                 conn,
		insCheck:             gorqlite.NewPreparedStatement("INSERT INTO checks (timestamp, customer_id, active, uri, report_webhook, last_result) VALUES (%d, %s, %d, %s, %s, 0)"),
		getCheck:             gorqlite.NewPreparedStatement("SELECT * FROM checks WHERE id=%d"),
		getAllChecks:         gorqlite.NewPreparedStatement("SELECT id, timestamp, customer_id, active, uri, report_webhook, last_result FROM checks WHERE active=1"),
		getChecksForCustomer: gorqlite.NewPreparedStatement("SELECT * FROM CHECKS WHERE customer_id=%s"),
		activeCheck:          gorqlite.NewPreparedStatement("UPDATE checks SET active=1 WHERE id=%d"),

		deactiveCheck: gorqlite.NewPreparedStatement("UPDATE checks SET active=0 WHERE id=%d"),
		removeCheck:   gorqlite.NewPreparedStatement("DELETE FROM checks WHERE id=%d"),
		updateLastRes: gorqlite.NewPreparedStatement("UPDATE checks SET last_result=%d WHERE id=%d"),
	}
}

func (c *Checks) Migrate() error {
	ddl := []string{
		`CREATE TABLE IF NOT EXISTS checks (id INTEGER PRIMARY KEY, timestamp INTEGER, customer_id TEXT, active INTEGER, uri TEXT, report_webhook TEXT, last_result INTEGER)`,
	}

	_, err := c.conn.Write(ddl)
	return err
}

func (c *Checks) InsertCheck(ch *common.Check) error {
	var active int
	if ch.Active {
		active = 1
	}

	res, err := c.conn.WriteOne(c.insCheck.Bind(ch.Timestamp.Unix(), ch.CustomerID, active, ch.URI, ch.ReportWebhook))
	if err != nil {
		return err
	}

	ch.ID = res.LastInsertID
	return nil
}

func (c *Checks) GetAllChecks() ([]common.Check, error) {
	var result []common.Check
	q := c.getAllChecks.Bind()
	log.Println(q)
	res, err := c.conn.QueryOne(q)
	if err != nil {
		return nil, err
	}
	if res.Err != nil {
		return nil, err
	}

	if res.NumRows() == 0 {
		return nil, sql.ErrNoRows
	}

	for res.Next() {
		var ch common.Check
		var chid int64
		var ts int64
		var act int64
		var lres int64
		err = res.Scan(&chid, &ts, &ch.CustomerID, &act, &ch.URI, &ch.ReportWebhook, &lres)
		if err != nil {
			return nil, err
		}

		ch.ID = int64(chid)
		ch.Timestamp = time.Unix(int64(ts), 0)
		ch.Active = act == 1
		ch.LastResult = common.Result(lres)

		result = append(result, ch)
	}

	return result, nil
}

func (c *Checks) GetCheck(cid int64) (*common.Check, error) {
	var ch common.Check

	res, err := c.conn.QueryOne(c.getCheck.Bind(cid))
	if err != nil {
		return nil, err
	}

	if res.NumRows() == 0 {
		return nil, sql.ErrNoRows
	}

	if !res.Next() {
		return nil, sql.ErrNoRows
	}

	var ts int64
	var act int64
	var lres int64
	err = res.Scan(&ch.ID, &ts, &ch.CustomerID, &act, &ch.URI, &ch.ReportWebhook, &lres)
	if err != nil {
		return nil, err
	}

	ch.Timestamp = time.Unix(ts, 0)
	ch.Active = act == 1
	ch.LastResult = common.Result(lres)

	return &ch, nil
}

func (c *Checks) UpdateLastResult(cid int64, result common.Result) error {
	_, err := c.conn.WriteOne(c.updateLastRes.Bind(int64(result), cid))
	return err
}