package db

import (
	"context"
	"database/sql"
	"errors"
	"time"
)

type System struct {
	Id            int64
	TextId        string
	Title         string
	Description   string
	Url           string
	Download      string
	CreatedAt     time.Time
	Compatibility Compatibility
}

type Systems []System

func (systems Systems) GetById(id int) *System {
	return &systems[id]
}

func (m FoundryStateModel) InsertSystem(system *System, stateId int64) error {
	query := `
		INSERT INTO systems (state_id, text_id, title, description, url, download)
		VALUES ($1, $2, $3, $4, $5, $6)`

	args := []any{stateId, system.TextId, system.Title, system.Description, system.Url, system.Download}

	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	err := m.DB.QueryRowContext(ctx, query, args...).Scan(&system.Id)
	if err != nil {
		return err
	}
	return m.InsertModuleCompatibility(&system.Compatibility, system.Id)
}

func (m FoundryStateModel) InsertSystenCompatibility(compatibility *Compatibility, systemId int64) error {
	query := `
		INSERT INTO systems_compatibility (system_id, minumum, verified, maximum)
		VALUES ($1, $2, $3, $4)`

	args := []any{systemId, compatibility.Minimum, compatibility.Verified, compatibility.Maximum}

	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	return m.DB.QueryRowContext(ctx, query, args...).Scan(&compatibility.Id)
}

func (m FoundryStateModel) GetSystems(idState int64) (Systems, error) {
	if idState < 1 {
		return nil, ErrorRecordNotFound
	}

	query := `
		SELECT id, created_at, text_id, title, description, url, download
		FROM systems
		WHERE state_id = $1`

	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	rows, err := m.DB.QueryContext(ctx, query, idState)
	if err != nil {
		switch {
		case errors.Is(err, sql.ErrNoRows):
			return nil, ErrorRecordNotFound
		default:
			return nil, err
		}
	}

	systems := make(Systems, 0, 1)

	for rows.Next() {
		var system System
		err := rows.Scan(
			&system.Id,
			&system.CreatedAt,
			&system.TextId,
			&system.Title,
			&system.Description,
			&system.Url,
			&system.Download,
		)
		if err != nil {
			return nil, err
		}
		compatibility, err := m.GetModuleCompatibility(system.Id)
		if err != nil {
			return nil, err
		}
		system.Compatibility = *compatibility
		systems = append(systems, system)
	}

	if err := rows.Err(); err != nil {
		return nil, err
	}

	return systems, nil
}

func (m FoundryStateModel) GetSystemCompatibility(idSystem int64) (*Compatibility, error) {
	if idSystem < 1 {
		return nil, ErrorRecordNotFound
	}

	query := `
		SELECT id, minimum, verified, maximum
		FROM systems_compatibility
		WHERE system_id = $1`

	var compatibility Compatibility

	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	err := m.DB.QueryRowContext(ctx, query, idSystem).Scan(
		&compatibility.Id,
		&compatibility.Minimum,
		&compatibility.Verified,
		&compatibility.Maximum,
	)

	if err != nil {
		switch {
		case errors.Is(err, sql.ErrNoRows):
			return nil, ErrorRecordNotFound
		default:
			return nil, err
		}
	}

	return &compatibility, nil
}