from django.contrib import admin
from django.utils.html import format_html

from .models import ProjectBrief, ProjectBriefAttachment, ProjectInternalNote


class ProjectBriefAttachmentInline(admin.TabularInline):
    model = ProjectBriefAttachment
    extra = 0
    readonly_fields = ("original_filename", "file", "uploaded_at")
    can_delete = True


class ProjectInternalNoteInline(admin.TabularInline):
    model = ProjectInternalNote
    extra = 1
    fields = ("author", "note", "created_at")
    readonly_fields = ("created_at",)


@admin.register(ProjectBrief)
class ProjectBriefAdmin(admin.ModelAdmin):
    list_display = (
        "title",
        "client",
        "category",
        "status_badge",
        "locked",
        "show_on_website",
        "budget_range",
        "submitted_at",
    )
    list_filter = (
        "status",
        "category",
        "budget_range",
        "locked",
        "show_on_website",
        "submitted_at",
    )
    search_fields = (
        "title",
        "description",
        "client__username",
        "client__email",
        "client__first_name",
        "client__last_name",
    )
    readonly_fields = ("client", "submitted_at", "updated_at")
    fieldsets = (
        (
            "Brief",
            {
                "description": (
                    "Each field has its own lock and website visibility controls. "
                    "Lock prevents client edits; Show on website includes the field "
                    "on the public card when the project is published."
                ),
                "fields": (
                    "client",
                    "locked",
                    "show_on_website",
                    ("title", "lock_title", "show_title_on_website"),
                    ("category", "lock_category", "show_category_on_website"),
                    "description",
                    ("lock_description", "show_description_on_website"),
                    ("budget_range", "lock_budget_range", "show_budget_on_website"),
                    ("desired_deadline", "lock_desired_deadline", "show_deadline_on_website"),
                    "reference_links",
                    ("lock_reference_links", "show_references_on_website"),
                    ("lock_attachments", "show_attachments_on_website"),
                ),
            },
        ),
        (
            "Workflow",
            {
                "fields": (
                    "status",
                    "quote_text",
                    "website_notes",
                    "submitted_at",
                    "updated_at",
                ),
            },
        ),
        (
            "Website showcase overrides",
            {
                "description": (
                    "Optional public-facing content. Leave blank to fall back to the "
                    "brief field values above."
                ),
                "fields": (
                    "public_title",
                    "public_summary",
                    "public_tags",
                    "public_image",
                    "public_project_status",
                    "public_url",
                ),
            },
        ),
    )
    inlines = [ProjectBriefAttachmentInline, ProjectInternalNoteInline]
    date_hierarchy = "submitted_at"

    class Media:
        css = {"all": ("css/project-brief-admin.css",)}

    def save_formset(self, request, form, formset, change):
        instances = formset.save(commit=False)
        for instance in instances:
            if isinstance(instance, ProjectInternalNote) and not instance.author_id:
                instance.author = request.user
            instance.save()
        formset.save_m2m()
        for obj in formset.deleted_objects:
            obj.delete()

    @admin.display(description="Status", boolean=False)
    def status_badge(self, obj):
        colors = {
            ProjectBrief.STATUS_SUBMITTED: "#3b82f6",
            ProjectBrief.STATUS_UNDER_REVIEW: "#8b5cf6",
            ProjectBrief.STATUS_QUOTED: "#f59e0b",
            ProjectBrief.STATUS_ACCEPTED: "#10b981",
            ProjectBrief.STATUS_DECLINED: "#ef4444",
            ProjectBrief.STATUS_IN_PROGRESS: "#06b6d4",
            ProjectBrief.STATUS_DELIVERED: "#22c55e",
            ProjectBrief.STATUS_CLOSED: "#6b7280",
        }
        color = colors.get(obj.status, "#6b7280")
        return format_html(
            '<span style="padding:2px 8px;border-radius:999px;background:{};color:#fff;font-size:12px;">{}</span>',
            color,
            obj.get_status_display(),
        )


@admin.register(ProjectInternalNote)
class ProjectInternalNoteAdmin(admin.ModelAdmin):
    list_display = ("brief", "author", "created_at")
    search_fields = ("brief__title", "note", "author__username")
    readonly_fields = ("created_at",)