from django.contrib import admin
from django.utils.html import format_html
from .models import JobPosition, JobApplication


@admin.register(JobPosition)
class JobPositionAdmin(admin.ModelAdmin):
    list_display = [
        'title', 
        'department', 
        'location', 
        'open_positions', 
        'employment_type',
        'status_badge',
        'featured',
        'posted_date',
        'applications_count'
    ]
    list_filter = ['status', 'employment_type', 'location_type', 'featured', 'department', 'posted_date']
    search_fields = ['title', 'department', 'location', 'short_description']
    prepopulated_fields = {'slug': ('title',)}
    readonly_fields = ['posted_date', 'updated_date', 'applications_count']
    
    fieldsets = (
        ('Basic Information', {
            'fields': ('title', 'slug', 'department', 'status', 'featured', 'priority')
        }),
        ('Employment Details', {
            'fields': ('employment_type', 'location_type', 'location', 'open_positions', 'experience_required')
        }),
        ('Salary Information', {
            'fields': ('salary_min', 'salary_max', 'salary_currency', 'salary_period', 'salary_additional')
        }),
        ('Job Description', {
            'fields': ('short_description', 'about_role')
        }),
        ('Requirements & Qualifications', {
            'fields': ('requirements', 'responsibilities', 'qualifications', 'bonus_points', 'benefits'),
            'classes': ('collapse',)
        }),
        ('Dates', {
            'fields': ('start_date', 'deadline', 'posted_date', 'updated_date')
        }),
    )
    
    def status_badge(self, obj):
        colors = {
            'active': 'green',
            'closed': 'red',
            'draft': 'orange'
        }
        return format_html(
            '<span style="color: {}; font-weight: bold;">{}</span>',
            colors.get(obj.status, 'black'),
            obj.get_status_display()
        )
    status_badge.short_description = 'Status'
    
    def applications_count(self, obj):
        count = obj.applications.count()
        return format_html(
            '<span style="font-weight: bold;">{} application(s)</span>',
            count
        )
    applications_count.short_description = 'Applications'


@admin.register(JobApplication)
class JobApplicationAdmin(admin.ModelAdmin):
    list_display = [
        'full_name',
        'email',
        'job',
        'status_badge',
        'applied_date',
        'resume_link'
    ]
    list_filter = ['status', 'job', 'applied_date']
    search_fields = ['first_name', 'last_name', 'email', 'job__title']
    readonly_fields = ['applied_date', 'updated_date', 'resume_link']
    
    fieldsets = (
        ('Job Information', {
            'fields': ('job', 'status')
        }),
        ('Applicant Information', {
            'fields': ('first_name', 'last_name', 'email', 'phone')
        }),
        ('Professional Information', {
            'fields': ('current_position', 'current_company', 'years_of_experience')
        }),
        ('Application Details', {
            'fields': ('cover_letter', 'resume', 'resume_link', 'portfolio_url')
        }),
        ('Social Links', {
            'fields': ('linkedin_url', 'github_url', 'website_url'),
            'classes': ('collapse',)
        }),
        ('Availability & Salary', {
            'fields': ('available_from', 'notice_period', 'expected_salary', 'salary_currency'),
            'classes': ('collapse',)
        }),
        ('Metadata', {
            'fields': ('applied_date', 'updated_date', 'consent', 'notes')
        }),
    )
    
    def status_badge(self, obj):
        colors = {
            'new': 'blue',
            'reviewing': 'orange',
            'shortlisted': 'purple',
            'interviewed': 'teal',
            'accepted': 'green',
            'rejected': 'red'
        }
        return format_html(
            '<span style="color: {}; font-weight: bold;">{}</span>',
            colors.get(obj.status, 'black'),
            obj.get_status_display()
        )
    status_badge.short_description = 'Status'
    
    def resume_link(self, obj):
        if obj.resume:
            return format_html(
                '<a href="{}" target="_blank">Download Resume</a>',
                obj.resume.url
            )
        return '-'
    resume_link.short_description = 'Resume'
    
    actions = ['mark_as_reviewing', 'mark_as_shortlisted', 'mark_as_rejected']
    
    def mark_as_reviewing(self, request, queryset):
        queryset.update(status='reviewing')
        self.message_user(request, f'{queryset.count()} application(s) marked as reviewing.')
    mark_as_reviewing.short_description = 'Mark as Reviewing'
    
    def mark_as_shortlisted(self, request, queryset):
        queryset.update(status='shortlisted')
        self.message_user(request, f'{queryset.count()} application(s) marked as shortlisted.')
    mark_as_shortlisted.short_description = 'Mark as Shortlisted'
    
    def mark_as_rejected(self, request, queryset):
        queryset.update(status='rejected')
        self.message_user(request, f'{queryset.count()} application(s) marked as rejected.')
    mark_as_rejected.short_description = 'Mark as Rejected'