package meteo

import (
	"errors"
	"time"
)

type MeteoData struct {
	Timestamp  time.Time `csv:"fecha" json:"timestamp"`
	Location   string    `csv:"ciudad" json:"location"`
	MaxTemp    float32   `csv:"temperatura maxima" json:"max_temp"`
	MinTemp    float32   `csv:"temperatura minima" json:"min_temp"`
	Rainfall   float32   `csv:"precipitacion" json:"rainfall"`
	Cloudiness int       `csv:"nubosidad" json:"cloudiness"`
}

type RejectedMeteoData struct {
	RowValue string
	Reason   string
}

type FileStats struct {
	BatchID      int    `json:"batch_id"`
	RowsInserted int    `json:"rows_inserted"`
	RowsRejected int    `json:"rows_rejected"`
	ElapsedMS    int    `json:"elapsed_ms"`
	FileChecksum string `json:"file_checksum"`
}

type GetMeteoData struct {
	Location string
	From     string
	To       string
	Page     int
	Limit    int
	Offset   int
}

func (mt *GetMeteoData) Validate() error {
	if mt.Location == "" {
		return ErrMissingOrInvalidLocation
	}

	if mt.From == "" {
		return ErrMissingOrInvalidFromDate
	}

	if mt.To == "" {
		return ErrMissingOrInvalidToDate
	}

	if _, err := time.Parse("2006-01-02", mt.From); err != nil {
		return ErrMissingOrInvalidFromDate
	}

	if _, err := time.Parse("2006-01-02", mt.To); err != nil {
		return ErrMissingOrInvalidToDate
	}

	mt.Offset = (mt.Page - 1) * mt.Limit

	return nil
}

var (
	ErrCannotParseFile            = errors.New("cannot parse file")
	ErrValidateRecord             = errors.New("error validating record")
	ErrRecordNotValid             = errors.New("record not valid")
	ErrReadingCSVHeader           = errors.New("error reading CSV header")
	ErrReadingCSVRow              = errors.New("error reading CSV row")
	ErrMissingOrInvalidDate       = errors.New("missing or invalid date")
	ErrMissingOrInvalidFromDate   = errors.New("missing or invalid from date")
	ErrMissingOrInvalidToDate     = errors.New("missing or invalid to date")
	ErrMissingOrInvalidLocation   = errors.New("missing or invalid location")
	ErrMissingOrInvalidMaxTemp    = errors.New("missing or invalid max temp")
	ErrMissingOrInvalidMinTemp    = errors.New("missing or invalid min temp")
	ErrMissingOrInvalidRainfall   = errors.New("missing or invalid rainfall")
	ErrMissingOrInvalidCloudiness = errors.New("missing or invalid cloudiness")
	ErrMaxTempOutOfRange          = errors.New("max temp out of range (must be <= 60°C)")
	ErrMinTempOutOfRange          = errors.New("min temp out of range (must be >= -20°C)")
	ErrRainfallOutOfRange         = errors.New("rainfall out of range (must be 0-500 mm)")
	ErrCloudinessOutOfRange       = errors.New("cloudiness out of range (must be 0-100%)")
	ErrParsingForm                = errors.New("error parsing form")
	ErrRetrievingFile             = errors.New("error retrieving file")
	ErrReadingFile                = errors.New("error reading file")
	ErrReadingData                = errors.New("error reading data")
)