package models

import (
	"fmt"
	"kontor-api-echo/internal/config"
	"kontor-api-echo/internal/helpers"
	"log/slog"
	"time"

	"github.com/uptrace/bun"
)

type MediaLoFi struct {
	bun.BaseModel `bun:"table:media_lofi"`

	ID             string     `bun:"id,pk"`
	CreatedAt      time.Time  `bun:"created_date,nullzero,notnull,default:current_timestamp"`
	UpdatedAt      time.Time  `bun:"last_modified_date,nullzero,notnull,default:current_timestamp"`
	DeletedAt      *time.Time `bun:"deleted_date,nullzero"`
	Version        int        `bun:"version,default:0"`
	WebLink        string     `bun:"url,unique:url"`
	Review         bool       `bun:"review"`
	ShouldDownload bool       `bun:"should_download"`
	Title          string     `bun:"title"`
	FileName       string     `bun:"file_name"`
}

func (media_lofi *MediaLoFi) Update(update MediaLoFiDTO) {
	media_lofi.CreatedAt = update.CreatedAt.Time
	media_lofi.UpdatedAt = time.Now()
	media_lofi.Version = media_lofi.Version + 1
	media_lofi.WebLink = update.WebLink
	media_lofi.Review = update.Review
	media_lofi.ShouldDownload = update.ShouldDownload
	media_lofi.Title = update.Title
	media_lofi.FileName = update.FileName
}

func (media_lofi *MediaLoFi) ConvertMediaLoFiToDTO() MediaLoFiDTO {
	dto := MediaLoFiDTO{
		ID:             media_lofi.ID,
		CreatedAt:      helpers.KontorTime{Time: media_lofi.CreatedAt},
		UpdatedAt:      helpers.KontorTime{Time: media_lofi.UpdatedAt},
		DeletedAt:      media_lofi.DeletedAt,
		Version:        media_lofi.Version,
		WebLink:        media_lofi.WebLink,
		Review:         media_lofi.Review,
		ShouldDownload: media_lofi.ShouldDownload,
		Title:          media_lofi.Title,
		FileName:       media_lofi.FileName,
	}
	return dto
}

type MediaLofiAdd struct {
	Url string `json:"url"`
}

type MediaLoFiForm struct {
	Title string `form:"title" binding:"required"`
	Url   string `form:"url" binding:"required"`
}

func (form *MediaLoFiForm) ConvertFormToMediaLofiDTO() MediaLoFiDTO {
	media_lofi := MediaLoFiDTO{}
	return media_lofi
}

type MediaLoFiDTO struct {
	ID             string             `json:"id"                     binding:"required"`
	CreatedAt      helpers.KontorTime `json:"created_date"`
	UpdatedAt      helpers.KontorTime `json:"last_modified_date"`
	DeletedAt      *time.Time         `json:"deleted_date,omitempty"`
	Version        int                `json:"version"`
	FileName       string             `json:"file_name"`
	Review         bool               `json:"review"`
	ShouldDownload bool               `json:"should_download"`
	Title          string             `json:"title"`
	WebLink        string             `json:"url"`
}

func (dto MediaLoFiDTO) ConvertDTOToModel() MediaLoFi {
	model := MediaLoFi{
		ID:             dto.ID,
		CreatedAt:      dto.CreatedAt.Time,
		UpdatedAt:      dto.UpdatedAt.Time,
		DeletedAt:      dto.DeletedAt,
		Version:        dto.Version,
		FileName:       dto.FileName,
		Review:         dto.Review,
		ShouldDownload: dto.ShouldDownload,
		Title:          dto.Title,
		WebLink:        dto.WebLink,
	}
	return model
}

func (source MediaLoFiDTO) Equals(target MediaLoFiDTO) bool {
	if config.Verbose > 1 {
		slog.Info("MediaLoFiDTO#Equals", "id", source.ID)
	}
	equals := true
	if source.Title != target.Title {
		if config.Verbose > 1 {
			slog.Info("MediaLoFiDTO#Equals: Title changed")
		}
		equals = false
	}
	if source.WebLink != target.WebLink {
		if config.Verbose > 1 {
			slog.Info("MediaLoFiDTO#Equals: WebLink changed")
		}
		equals = false
	}
	if source.Version != target.Version {
		if config.Verbose > 1 {
			slog.Info("MediaLoFiDTO#Equals: Version changed")
		}
		equals = false
	}
	if source.FileName != target.FileName {
		if config.Verbose > 1 {
			slog.Info("MediaLoFiDTO#Equals: FileName changed")
		}
		equals = false
	}
	if source.Review != target.Review {
		if config.Verbose > 1 {
			slog.Info("MediaLoFiDTO#Equals: Review changed")
		}
		equals = false
	}
	if source.ShouldDownload != target.ShouldDownload {
		if config.Verbose > 1 {
			slog.Info("MediaLoFiDTO#Equals: ShouldDownload changed")
		}
		equals = false
	}
	return equals
}

type MediaLoFiDTOList []MediaLoFiDTO

func (source MediaLoFiDTOList) GetMediaLofi(lofi_id string) *MediaLoFiDTO {
	for _, lofi := range source {
		if lofi.ID == lofi_id {
			return &lofi
		}
	}
	return nil
}

func (source *MediaLoFiDTOList) CompareIds(target *MediaLoFiDTOList) (missing, obsolete, changed []string) {
	sources := make(map[string]MediaLoFiDTO, len(*source))
	targets := make(map[string]MediaLoFiDTO, len(*target))
	for _, source := range *source {
		sources[source.ID] = source
	}
	for _, target := range *target {
		targets[target.ID] = target
	}
	// iterate source IDs
	for id := range sources {
		if _, ok := targets[id]; ok {
			if config.Verbose > 1 {
				slog.Info(fmt.Sprintf("ID %s found in both lists", id))
			}
			if !sources[id].Equals(targets[id]) {
				changed = append(changed, id)
			}
		} else {
			missing = append(missing, id)
		}
	}
	for id := range targets {
		if _, ok := sources[id]; ok {
			slog.Debug(fmt.Sprintf("ID %s found in both lists", id))
		} else {
			obsolete = append(obsolete, id)
		}
	}
	slog.Info("CompareIds", "missing", len(missing), "obsolete", len(obsolete), "changed", len(changed))
	slog.Debug("CompareIds", "missing", missing, "obsolete", obsolete)
	return missing, obsolete, changed
}

func ConvertMediaLoFisToDtos(media_lofis []MediaLoFi) MediaLoFiDTOList {
	dtos := make(MediaLoFiDTOList, len(media_lofis))
	for i, media_lofi := range media_lofis {
		dtos[i] = media_lofi.ConvertMediaLoFiToDTO()
	}
	return dtos
}