from django.contrib import admin, messages
from django.db.models import Prefetch
from import_export import fields, resources
from import_export.admin import ExportMixin
from import_export.widgets import DecimalWidget, IntegerWidget

from manuels.models import (
    Book,
    CommonSupply,
    Editor,
    ISBNError,
    Level,
    SuppliesRequirement,
    Teacher,
)


class TeacherResource(resources.ModelResource):
    class Meta:
        model = Teacher
        fields = ("first_name", "last_name", "email", "phone_number")


@admin.register(Teacher)
class TeacherAdmin(ExportMixin, admin.ModelAdmin):
    resource_class = TeacherResource
    list_display = ["full_name", "email", "phone_number", "has_confirmed_list"]

    def send_link(self, request, queryset):
        for teacher in queryset:
            teacher.send_link(request)
        messages.success(
            request,
            f"Le lien a bien été envoyé aux {queryset.count()} coordonateur(s) sélectionné(s).",
        )

    send_link.short_description = "Envoyer le lien"

    actions = [send_link]


class LevelResource(resources.ModelResource):
    non_acquired_book_count = fields.Field(
        attribute="non_acquired_book_count", widget=IntegerWidget()
    )
    non_acquired_book_price = fields.Field(
        attribute="non_acquired_book_price", widget=DecimalWidget()
    )
    non_acquired_consumable_count = fields.Field(
        attribute="non_acquired_consumable_count", widget=IntegerWidget()
    )
    non_acquired_consumable_price = fields.Field(
        attribute="non_acquired_consumable_price", widget=DecimalWidget()
    )
    non_acquired_total_price = fields.Field(
        attribute="non_acquired_total_price", widget=DecimalWidget()
    )

    class Meta:
        model = Level
        fields = (
            "name",
            "non_acquired_book_count",
            "non_acquired_book_price",
            "non_acquired_consumable_count",
            "non_acquired_consumable_price",
            "non_acquired_total_price",
        )
        export_order = (
            "name",
            "non_acquired_book_count",
            "non_acquired_book_price",
            "non_acquired_consumable_count",
            "non_acquired_consumable_price",
            "non_acquired_total_price",
        )


@admin.register(Level)
class LevelAdmin(ExportMixin, admin.ModelAdmin):
    resource_class = LevelResource
    list_display = [
        "name",
        "order",
        "non_acquired_book_count",
        "non_acquired_book_price",
        "non_acquired_consumable_count",
        "non_acquired_consumable_price",
        "non_acquired_total_price",
    ]
    list_editable = ["order"]
    list_display_links = ["name"]

    def get_queryset(self, request):
        return (
            super(LevelAdmin, self)
            .get_queryset(request)
            .prefetch_related(Prefetch("book_set", to_attr="prefetched_books"))
        )

    def non_acquired_book_count(self, obj: Level):
        return obj.non_acquired_book_count

    non_acquired_book_count.short_description = (
        "Nombre de livres à acheter (hors consommables)"
    )

    def non_acquired_book_price(self, obj: Level):
        return f"{obj.non_acquired_book_price:.2f}€"

    non_acquired_book_price.short_description = (
        "Coût des livres à acheter (hors consommables)"
    )

    def non_acquired_consumable_count(self, obj: Level):
        return obj.non_acquired_consumable_count

    non_acquired_consumable_count.short_description = "Nombre de consommables à acheter"

    def non_acquired_consumable_price(self, obj: Level):
        return f"{obj.non_acquired_consumable_price:.2f}€"

    non_acquired_consumable_price.short_description = "Coût des consommables à acheter"

    def non_acquired_total_price(self, obj: Level):
        return f"{obj.non_acquired_total_price:.2f}€"

    non_acquired_total_price.short_description = "Coût total à acheter"


class BookResource(resources.ModelResource):
    decitre_url = fields.Field(attribute="decitre_url")

    class Meta:
        model = Book
        fields = (
            "title",
            "authors",
            "editor__name",
            "publication_year",
            "isbn",
            "comments",
            "other_editor",
            "price",
            "previously_acquired",
            "teacher__first_name",
            "teacher__last_name",
            "level__name",
            "field",
            "consumable",
            "decitre_url",
        )
        export_order = (
            "level__name",
            "field",
            "title",
            "authors",
            "editor__name",
            "publication_year",
            "isbn",
            "price",
            "other_editor",
            "previously_acquired",
            "teacher__first_name",
            "teacher__last_name",
            "comments",
            "consumable",
            "decitre_url",
        )


@admin.register(Book)
class BookAdmin(ExportMixin, admin.ModelAdmin):
    resource_class = BookResource
    list_display = [
        "level",
        "field",
        "title",
        "authors",
        "editor",
        "other_editor",
        "publication_year",
        "isbn",
        "price",
        "previously_acquired",
        "teacher",
        "done",
        "consumable",
    ]
    list_editable = ["done"]
    list_filter = [
        "done",
        "previously_acquired",
        "consumable",
        "level",
        "editor",
        "teacher",
    ]
    list_display_links = ["title"]
    fieldsets = [
        (
            "Infos livre",
            {
                "fields": (
                    "title",
                    "consumable",
                    "authors",
                    ("editor", "other_editor"),
                    "publication_year",
                    "isbn",
                    "created_at",
                    "updated_at",
                    "comments",
                )
            },
        ),
        (
            "Élève",
            {
                "fields": (
                    "price",
                    "previously_acquired",
                )
            },
        ),
        ("Coordonnateur", {"fields": ("teacher", "level", "field")}),
        ("Gestion", {"fields": ("done",)}),
    ]
    readonly_fields = ["created_at", "updated_at"]

    def get_queryset(self, request):
        return (
            super(BookAdmin, self)
            .get_queryset(request)
            .select_related("editor", "level", "teacher")
        )

    def update_with_decitre(self, request, queryset):
        for book in queryset:
            try:
                book.update_from_decitre()
                messages.success(
                    request,
                    f'Mise à jour réussie du livre "{book.title}" ({book.level.name} - {book.field})',
                )
            except ISBNError as e:
                messages.warning(
                    request,
                    f'Erreur lors de la mise à jour du livre "{book.title}" ({book.level.name} - {book.field}) : {e.data.get("error")}',
                )

    update_with_decitre.short_description = "Mettre à jour avec Decitre"

    def mark_as_done(self, request, queryset):
        queryset.update(done=True)

    mark_as_done.short_description = "Marquer comme traité"
    actions = [update_with_decitre, mark_as_done]


@admin.register(Editor)
class EditorAdmin(admin.ModelAdmin):
    pass


@admin.register(CommonSupply)
class CommonSupplyAdmin(admin.ModelAdmin):
    list_display = ["name", "order"]
    list_display_links = ["name"]
    list_editable = ["order"]


class SuppliesResource(resources.ModelResource):
    class Meta:
        model = SuppliesRequirement
        fields = (
            "supplies",
            "field",
            "level__name",
            "teacher__first_name",
            "teacher__last_name",
        )
        export_order = (
            "level__name",
            "field",
            "supplies",
            "teacher__first_name",
            "teacher__last_name",
        )


@admin.register(SuppliesRequirement)
class SuppliesRequirementAdmin(ExportMixin, admin.ModelAdmin):
    resource_class = SuppliesResource
    list_display = ["id", "teacher", "level", "field", "supplies", "done"]
    list_editable = ["done"]
    readonly_fields = ["created_at", "updated_at"]
    list_filter = ["done", "teacher", "level"]

    def get_queryset(self, request):
        return (
            super(SuppliesRequirementAdmin, self)
            .get_queryset(request)
            .select_related("level", "teacher")
        )