PlantGuide/PlantGuide/Presentation/Scenes/PlantDetail/Components/AllTasksView.swift

//
//  AllTasksView.swift
//  PlantGuide
//
//  Created on 2026-01-31.
//

import SwiftUI

// MARK: - AllTasksView

/// Displays all pending care tasks for a plant
struct AllTasksView: View {
    // MARK: - Properties

    let plantName: String
    let tasks: [CareTask]
    var onTaskComplete: ((CareTask) -> Void)?

    // MARK: - Body

    var body: some View {
        Group {
            if tasks.isEmpty {
                emptyStateView
            } else {
                taskListView
            }
        }
        .navigationTitle("All Tasks")
        .navigationBarTitleDisplayMode(.inline)
        .background(Color(.systemGroupedBackground))
    }

    // MARK: - Task List View

    private var taskListView: some View {
        ScrollView {
            VStack(spacing: 16) {
                // Overdue tasks section
                let overdueTasks = tasks.filter { $0.isOverdue }
                if !overdueTasks.isEmpty {
                    taskSection(title: "Overdue", tasks: overdueTasks, tintColor: .red)
                }

                // Today's tasks
                let todayTasks = tasks.filter { !$0.isOverdue && Calendar.current.isDateInToday($0.scheduledDate) }
                if !todayTasks.isEmpty {
                    taskSection(title: "Today", tasks: todayTasks, tintColor: .blue)
                }

                // Upcoming tasks
                let upcomingTasks = tasks.filter { !$0.isOverdue && !Calendar.current.isDateInToday($0.scheduledDate) }
                if !upcomingTasks.isEmpty {
                    taskSection(title: "Upcoming", tasks: upcomingTasks, tintColor: .secondary)
                }
            }
            .padding()
        }
    }

    // MARK: - Task Section

    private func taskSection(title: String, tasks: [CareTask], tintColor: Color) -> some View {
        VStack(alignment: .leading, spacing: 12) {
            HStack {
                Text(title)
                    .font(.headline)
                    .foregroundStyle(tintColor)

                Spacer()

                Text("\(tasks.count)")
                    .font(.subheadline)
                    .foregroundStyle(.secondary)
            }

            VStack(spacing: 8) {
                ForEach(tasks) { task in
                    TaskRow(task: task, onComplete: {
                        onTaskComplete?(task)
                    })
                }
            }
        }
        .padding()
        .background(Color(.systemGray6))
        .cornerRadius(12)
    }

    // MARK: - Empty State View

    private var emptyStateView: some View {
        VStack(spacing: 16) {
            Spacer()

            Image(systemName: "checkmark.circle")
                .font(.system(size: 60))
                .foregroundStyle(.green)

            Text("All Caught Up!")
                .font(.title2)
                .fontWeight(.semibold)

            Text("No pending care tasks for \(plantName)")
                .font(.subheadline)
                .foregroundStyle(.secondary)
                .multilineTextAlignment(.center)

            Spacer()
        }
        .padding()
    }
}

// MARK: - Previews

#Preview("All Tasks - With Tasks") {
    let samplePlantID = UUID()
    let sampleTasks = [
        CareTask(
            plantID: samplePlantID,
            type: .watering,
            scheduledDate: Date().addingTimeInterval(-86400), // 1 day ago (overdue)
            notes: "Check soil moisture"
        ),
        CareTask(
            plantID: samplePlantID,
            type: .fertilizing,
            scheduledDate: Date(), // Today
            notes: ""
        ),
        CareTask(
            plantID: samplePlantID,
            type: .pruning,
            scheduledDate: Date().addingTimeInterval(86400 * 3), // 3 days from now
            notes: "Remove dead leaves"
        ),
        CareTask(
            plantID: samplePlantID,
            type: .watering,
            scheduledDate: Date().addingTimeInterval(86400 * 7), // 7 days from now
            notes: ""
        )
    ]

    return NavigationStack {
        AllTasksView(plantName: "Monstera", tasks: sampleTasks) { task in
            print("Completed task: \(task.type)")
        }
    }
}

#Preview("All Tasks - Empty") {
    NavigationStack {
        AllTasksView(plantName: "Monstera", tasks: [])
    }
}